CN116819353A

CN116819353A - Head-mounted equipment and battery expansion detection system thereof

Info

Publication number: CN116819353A
Application number: CN202310786671.4A
Authority: CN
Inventors: 陈桂川
Original assignee: Shenzhen Goertek Technology Co ltd
Current assignee: Shenzhen Goertek Technology Co ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-09-29

Abstract

The application discloses a head-mounted device and a battery expansion detection system thereof, which are applied to the technical field of fault detection and comprise: a first conductive layer attached to the detected surface of the case of the first battery; a first contact layer provided with N contacts spaced from the first conductive layer; the first end of the ith resistor is connected with the second end of the ith-1 resistor; the first connector is respectively connected with the first contact layer and the protection plate, and sequentially connects the 1 st to the N th contacts in the first contact layer to the second ends of the 1 st to the N th resistors; and the processing device is arranged on the protection plate and is used for detecting the equivalent impedance between the first end of the 1 st resistor and the ground and performing expansion positioning based on the detected equivalent impedance when the first battery expands. By applying the scheme of the application, the battery expansion detection can be effectively carried out.

Description

Head-mounted equipment and battery expansion detection system thereof

Technical Field

The application relates to the technical field of fault detection, in particular to a head-mounted device and a battery expansion detection system thereof.

Background

At present, people cannot leave the electronic products in daily life, and the safety requirements on the electronic products are higher and higher. Batteries are an indispensable part of electronic products, and often cause serious heat generation and even expansion due to continuous operation, and finally cause explosion. The detection of battery swelling is particularly important for head-mounted devices, which require a long period of time to wear.

In summary, how to effectively perform battery expansion detection is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a head-mounted device and a battery expansion detection system thereof, so as to effectively detect battery expansion.

In order to solve the technical problems, the invention provides the following technical scheme:

a battery expansion detection system, comprising:

a first conductive layer attached to the detected surface of the case of the first battery;

a first contact layer provided with N contacts; when the first battery is in a normal state, a certain interval exists between the first contact layer and the first conductive layer, and when the first battery expands to enable at least 2 contacts to be in contact with the first conductive layer, all the contacts in contact with the first conductive layer are in a mutual conduction state;

The first end of the ith resistor is connected with the second end of the ith resistor, i is a positive integer, i is more than 1 and less than or equal to N, and N is a positive integer not less than 2;

a first connector connected to the first contact layer and the protection plate, respectively, and the first connector connects the 1 st to nth contacts in the first contact layer to the second ends of the 1 st to nth resistors in sequence;

and the processing device is arranged on the protection plate and is used for detecting the equivalent impedance between the first end of the 1 st resistor and the ground and performing expansion positioning based on the detected equivalent impedance when the first battery expands.

In one embodiment, the processing device comprises: a first fixed resistor and a processing unit;

the first end of the first fixed resistor is connected with the positive electrode of the first power supply, and the second end of the first fixed resistor is connected with the first end of the 1 st resistor;

the processing unit is used for: and detecting the voltage between the first end of the 1 st resistor and the ground, determining the equivalent impedance between the first end of the 1 st resistor and the ground based on the voltage of the first power supply and the resistance value of the first fixed resistor, and performing expansion positioning based on the detected equivalent impedance when the first battery expands.

In one embodiment, the processing device is specifically configured to:

detecting an equivalent impedance between a first end of the 1 st resistor and ground;

when the equivalent impedance accords with a set normal range, determining that the first battery is in a normal state;

when the equivalent impedance accords with a set kth fault range, determining that the first battery expands, and determining an expansion positioning result corresponding to the kth fault range according to a preset corresponding relation; k is a positive integer.

In one embodiment, among the 1 st to nth resistors, resistance values of the remaining N-1 resistors other than the 1 st resistor are different from each other.

In one embodiment, of the N contacts of the first contact layer, at least 1 contact is a distributed contact;

for any 1 distributed contact, the distributed contact comprises M contact units arranged in the first contact layer, the M contact units are mutually connected, and a common end of connection is used as a connection end of the distributed contact for connecting the first connector; m is a positive integer not less than 2.

In one embodiment, the method further comprises: an alarm device connected to the processing device;

The processing device is also used for: and when the expansion of the first battery is detected, controlling the first battery to be powered off and controlling the alarm device to alarm.

In one embodiment, the method further comprises: the first current limiting resistor, the second current limiting resistor and the first in-place detection resistor are arranged on the protection plate;

the second end of the N-th resistor is connected with the first end of the first current-limiting resistor, the second end of the first current-limiting resistor is connected with the first end of the second current-limiting resistor, the second end of the second current-limiting resistor is grounded, and the second end of the first in-place detection resistor is respectively connected with the second end of the first current-limiting resistor and the first end of the second current-limiting resistor;

the first end of the first in-place detection resistor is connected with the first in-place detection end of the first connector, and the second end of the second current limiting resistor is connected with the second in-place detection end of the first connector;

in the first connector, a first in-place detection end of the first connector is connected with a second in-place detection end of the first connector;

correspondingly, the processing device is further used for: and detecting the equivalent impedance between the first end of the 1 st resistor and the ground, and determining whether the expansion detection function of the first battery is in a normal state or not based on the detected equivalent impedance.

In one embodiment, the method further comprises:

a second conductive layer attached to the detected surface of the case of the second battery;

a second contact layer provided with N contacts; when the second battery is in a normal state, a certain interval exists between the second contact layer and the second conductive layer, and when the second battery expands to enable at least 2 contacts to be in contact with the second conductive layer, all the contacts in contact with the second conductive layer are in a mutual conduction state;

the second connector is respectively connected with the second contact layer and the protection plate, and sequentially connects the 1 st to the N th contacts in the second contact layer to the second ends of the 1 st to the N th resistors;

correspondingly, the processing device is specifically used for: and detecting the equivalent impedance between the first end of the 1 st resistor and the ground, and performing expansion positioning based on the detected equivalent impedance when the first battery and/or the second battery expand.

In one embodiment, the method further comprises: the first current limiting resistor, the second current limiting resistor and the second in-place detection resistor are arranged on the protection plate;

the second end of the N-th resistor is connected with the first end of the first current-limiting resistor, the second end of the first current-limiting resistor is connected with the first end of the second current-limiting resistor, the second end of the second current-limiting resistor is grounded, and the second end of the second in-place detection resistor is respectively connected with the second end of the first current-limiting resistor and the first end of the second current-limiting resistor;

The first end of the second in-place detection resistor is connected with the first in-place detection end of the second connector, and the second end of the second current limiting resistor is connected with the second in-place detection end of the second connector;

in the second connector, a first in-place detection end of the second connector is connected with a second in-place detection end of the second connector;

correspondingly, the processing device is further used for: and detecting the equivalent impedance between the first end of the 1 st resistor and the ground, and determining whether the expansion detection function of the second battery is in a normal state or not based on the detected equivalent impedance.

A head-mounted device comprising a battery inflation detection system as described above.

By applying the technical scheme provided by the embodiment of the invention, the first conductive layer is attached to the detected surface of the shell of the first battery, and when the first battery is in a normal state, a certain interval exists between the first contact layer and the first conductive layer, that is, when the first battery is in a normal state, the first contact layer is not contacted with the first conductive layer. The 1 st resistor to the N resistor are sequentially connected in series on the protection plate, the second end of the N resistor is grounded, the first end of the i resistor is connected with the second end of the i-1 th resistor, and the first connector sequentially connects the 1 st to the N contacts in the first contact layer to the second ends of the 1 st resistor to the N resistor. It can be seen that, when the first battery is in a normal state, the first contact layer and the first conductive layer are not in contact, and at this time, the equivalent impedance between the first end of the 1 st resistor and the ground detected by the processing device is the sum of the resistances from the 1 st resistor to the nth resistor. If the detected surface of the first battery is expanded, the first contact layer is in contact with the first conductive layer, it can be understood that the expansion positions are different, the contact surfaces of the first contact layer and the first conductive layer are different, the contacts on the contact surfaces are in a mutual conduction state, based on the circuit structure, when at least 2 contacts are in the mutual conduction state, the contacts are short-circuited between the corresponding connection points on the protection plate through the first connector, so that the equivalent impedance between the first end of the 1 st resistor and the ground is influenced, and it can be understood that the short-circuited condition between the contacts is determined through the value of the equivalent impedance between the first end of the 1 st resistor and the ground, namely, the expansion positioning of the first battery is realized.

In summary, the solution of the present application can effectively perform battery expansion detection, and perform expansion positioning of the first battery, so as to help to find the expansion area more quickly, even if the subsequent processing is performed.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a battery expansion detection system according to the present application;

FIG. 2a is a schematic view of the external structure of a first contact layer according to an embodiment of the present application;

fig. 2b is a schematic view showing an internal structure of the first contact layer according to an embodiment of the present application;

FIG. 3 is a schematic diagram showing a battery expansion detection system according to an embodiment of the present application;

FIG. 4 is a schematic diagram showing a battery expansion detection system according to another embodiment of the present application;

FIG. 5a is a schematic diagram of an equivalent circuit of a first battery and a second battery in place and not in expansion in an embodiment of the application;

FIG. 5b is a schematic diagram of an equivalent circuit of a first battery in an out-of-position and a second battery in an unexpanded state in accordance with an embodiment of the present invention;

FIG. 5c is a schematic diagram of an equivalent circuit of a second battery in an embodiment of the present invention, the second battery being out of position, the first battery being in position and not expanding;

FIG. 5d is a schematic diagram of an equivalent circuit of the first battery and the second battery in-place in an embodiment of the present invention;

FIG. 6a is a schematic diagram of an equivalent circuit of a case where the first battery and the second battery are in place, and expansion of the first battery and/or the second battery causes a short circuit between the 1 st contact and the 2 nd contact in the first contact layer and/or the second contact layer, in an embodiment of the present invention;

FIG. 6b is a schematic diagram of an equivalent circuit of a case where the first battery and the second battery are both in place, and expansion of the first battery and/or the second battery causes a short circuit between the 1 st contact and the 3 rd contact in the first contact layer and/or the second contact layer, in an embodiment of the present invention;

FIG. 6c is a schematic diagram of an equivalent circuit of an embodiment of the present invention in which the first and second batteries are both in place, and expansion of the first and/or second batteries results in a short circuit condition between the 3 rd and 4 th contacts in the first and/or second contact layers;

Fig. 7 is a schematic structural view of a processing apparatus according to an embodiment of the present invention.

Detailed Description

The core of the invention is to provide a battery expansion detection system which can effectively detect the expansion of a battery and can perform expansion positioning of a first battery, thereby helping to find an expansion area more quickly even if the subsequent processing is performed.

In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery expansion detecting system according to the present invention, where the battery expansion detecting system may include:

a first conductive layer 10 attached to the detected surface of the case of the first battery;

a first contact layer 20 provided with N contacts; when the first battery is in a normal state, a certain interval exists between the first contact layer 20 and the first conductive layer 10, and when the first battery expands to enable at least 2 contacts to be in contact with the first conductive layer 10, the contacts in contact with the first conductive layer 10 are in a mutual conduction state;

The first end of the ith resistor is connected with the second end of the ith resistor-1, i is a positive integer, i is more than 1 and less than or equal to N, and N is a positive integer not less than 2;

a first connector 30 connected to the first contact layer 20 and the protection plate, respectively, and the first connector 30 connects the 1 st to nth contacts in the first contact layer 20 to the second ends of the 1 st to nth resistors in sequence;

and a processing device 40 provided on the protection plate for detecting the equivalent impedance between the first end of the 1 st resistor R1 and the ground, and performing expansion positioning based on the detected equivalent impedance when the first battery expands.

Specifically, N is a positive integer not less than 2, and in the embodiment of fig. 1, the value of N is set to 2 for convenience in viewing and description, that is, in fig. 1, a 1 st resistor R1 and a 2 nd resistor R2 are sequentially connected in series are provided on a protection plate, a first end of the 1 st resistor R1 is connected with the processing device 40, so that the processing device 40 can detect an equivalent impedance between the first end of the 1 st resistor R1 and the ground, a second end of the 1 st resistor R1 is connected with a 1 st end of the 2 nd resistor R2, and a second end of the 2 nd resistor R2 is grounded.

The first conductive layer 10 is attached to the surface to be detected of the case of the first battery, that is, if the surface to be detected of the first battery swells, the position of the first conductive layer 10 changes with the swelling of the surface to be detected. The specific material of the first conductive layer 10 may be set and adjusted according to actual needs, but should be a conductive material, for example, in an occasion, in order to facilitate contact between the first conductive layer 10 and the first contact layer 20, the first conductive layer 10 may be made of a conductive foam material.

When the first battery is in a normal state, a certain distance exists between the first contact layer 20 and the first conductive layer 10, so that none of the N contacts arranged on the first contact layer 20 is in contact with the first conductive layer 10 when the first battery is in a normal state.

The first contact layer 20 is provided with N contacts, which are not conductive to each other in a normal state.

The specific material of the first contact layer 20 may also be set and adjusted according to actual needs, for example, in one occasion, the first contact layer 20 may be implemented by using a PFC board. Referring to fig. 2a and 2b, the first contact layer 20 of the present application is implemented by a double-layered FPC board. Fig. 2a is a schematic diagram of an external structure of the first contact layer 20 in an embodiment, in the embodiment of fig. 2a, the first contact layer 20 is implemented by using a PFC board, and a blank area therein represents an insulating solder mask layer of an outer layer, and a black circle portion represents a copper-leakage conductive contact. Fig. 2b is a schematic view of the internal structure of the first contact layer 20 in this embodiment, and it can be seen that each conductive contact is electrically connected to the first connector 30.

The first connector 30 is connected to the first contact layer 20 and the protection board, and various specific implementations can be adopted, and a male-female structure is commonly used, and in fig. 2a and 2b of the present application, the first connector 30 is a male-female connector.

Specifically, the first connector 30 may sequentially connect the 1 st to nth contacts in the first contact layer 20 to the second ends of the 1 st to nth resistors R1 to R1 st. Taking fig. 1 as an example, the first connector 30 connects the 1 st contact in the first contact layer 20 to the second end of the 1 st resistor R1, and connects the 2 nd contact in the first contact layer 20 to the second end of the 2 nd resistor R2.

As can be seen from the circuit structure of fig. 1, if the first battery expands, the first conductive layer 10 contacts the first contact layer 20 after the first conductive layer 10 is deformed. If the contact area between the first conductive layer 10 and the first contact layer 20 includes the 1 st contact and the 2 nd contact in the first contact layer 20, the 1 st contact and the 2 nd contact are in a conductive state at this time, so that the 2 nd resistor R2 is equivalent to being shorted, and the equivalent impedance between the first end of the 1 st resistor R1 and the ground changes. As can be seen from fig. 1, in the normal state, the equivalent impedance between the first end of the 1 st resistor R1 and the ground should be r1+r2, and since the first battery swells, the 1 st contact and the 2 nd contact are in the conducting state, the 2 nd resistor R2 is shorted, and the equivalent impedance between the first end of the 1 st resistor R1 and the ground should be R1. When the processing means 40 detects an equivalent impedance of R1, it can be determined that the first battery has swelled and that the swelling area is the corresponding area between the 1 st contact and the 2 nd contact, i.e. that the swelling positioning is achieved.

Of course, in the example of fig. 1, since only 2 contacts are provided, if expansion is detected, the expansion positioning result must be between these 2 contacts. If a greater number of contacts are provided on the first contact layer 20 and a greater number of resistors are provided on the protective plate, i.e. N is given a greater value, a finer positioning of the expansion can be achieved. It will be appreciated that when N is more, after the first battery expands, the expansion position is different, and the contact surface between the first contact layer 20 and the first conductive layer 10 is different, that is, the contact points are different when they are conducted, which affects the equivalent impedance between the first end of the 1 st resistor R1 and the ground. Therefore, by the value of the equivalent impedance between the first end of the 1 st resistor R1 and the ground, it can be determined which short-circuit condition between the contacts occurs, that is, the expansion positioning of the first battery is realized. In the following embodiments, there is also a corresponding illustration of the expansion positioning.

The protection board of the application can be a specially arranged protection board, and can also be an original protection board, for example, in products such as head-mounted equipment, the original protection board is usually originally arranged for realizing battery management, for example, the original protection board can realize the functions of voltage monitoring, short-circuit protection and the like of a battery, so that in partial occasions, the original protection board can be used, and only the function expansion of the protection board is needed according to the requirements of the application, thereby reducing the cost. In the embodiment of fig. 2, the protection plate is connected to 2 connectors via the lower left and lower right female heads, respectively, while the upper female head may be connected to other devices, for example, in one instance, where it is connected to the main board of the head-mounted device via connecting wires.

By applying the technical scheme provided by the embodiment of the invention, the first conductive layer 10 is attached to the detected surface of the shell of the first battery, and when the first battery is in a normal state, a certain interval exists between the first contact layer 20 and the first conductive layer 10, that is, when the first battery is in a normal state, the first contact layer 20 is not contacted with the first conductive layer 10. Since the 1 st to nth resistors R1 to N-th resistors are sequentially connected in series to the protection plate, the second ends of the nth resistors are grounded, the first end of the ith resistor is connected to the second end of the i-1 st resistor, and the first connector 30 sequentially connects the 1 st to nth contacts in the first contact layer 20 to the second ends of the 1 st to N-th resistors R1 to N-th. It can be seen that, when the first battery is in a normal state, the first contact layer 20 is not in contact with the first conductive layer 10, and at this time, the equivalent impedance between the first end of the 1 st resistor R1 and the ground detected by the processing device 40 is the sum of the resistances of the 1 st resistor R1 to the nth resistor. If the detected surface of the first battery is expanded, the first contact layer 20 is partially contacted with the first conductive layer 10, it can be understood that the expansion positions are different, the contact surfaces of the first contact layer 20 and the first conductive layer 10 are also different, the contacts on the contact surfaces are in a mutual conduction state, and when at least 2 contacts are in the mutual conduction state according to the circuit structure, the contacts are short-circuited between the corresponding connection points connected to the protection plate through the first connector 30, so that the equivalent impedance between the first end of the 1 st resistor R1 and the ground is influenced, and it can be understood that the short-circuit condition between the contacts can be determined through the value of the equivalent impedance between the first end of the 1 st resistor R1 and the ground, that is, the expansion positioning of the first battery is realized.

In one embodiment of the present application, referring to fig. 3, the method may further include: the first current limiting resistor RS1, the second current limiting resistor RS2 and the first in-place detection resistor RZ1 are arranged on the protection plate;

the second end of the N-th resistor is connected with the first end of the first current limiting resistor RS1, the second end of the first current limiting resistor RS1 is connected with the first end of the second current limiting resistor RS2, the second end of the second current limiting resistor RS2 is grounded, and the second end of the first in-place detection resistor RZ1 is respectively connected with the second end of the first current limiting resistor RS1 and the first end of the second current limiting resistor RS 2;

the first end of the first in-place detection resistor RZ1 is connected with the first in-place detection end of the first connector 30, and the second end of the second current limiting resistor RS2 is connected with the second in-place detection end of the first connector 30;

in the first connector 30, a first in-place detecting end of the first connector 30 and a second in-place detecting end of the first connector 30 are connected to each other;

correspondingly, the processing device 40 is further configured to: an equivalent impedance between the first end of the 1 st resistor R1 and ground is detected, and it is determined whether or not the swelling detecting function of the first battery is in a normal state based on the detected equivalent impedance.

In this embodiment, the processing device 40 may implement the in-place status detection of the first battery. As described above, in the embodiment of fig. 1, the equivalent impedance between the first end of the 1 st resistor R1 and the ground should be r1+r2 in the normal state, but in the embodiment of fig. 1, if the first battery is not expanded, but, for example, a case where the first connector 30 is in poor contact, the connection of the first connector 30 and the protection plate is broken, the first connector 30 is broken from the first contact layer 20, and the like, the equivalent impedance between the first end of the 1 st resistor R1 and the ground is still r1+r2. That is, there is a case where the function of the expansion detection is disabled.

In this embodiment, as can be seen from the circuit structure of fig. 3, when the first contact layer 20 is successfully connected to the protection board through the first connector 30 and the first battery is not expanded, the equivalent impedance between the first end of the 1 st resistor R1 and ground should be r1+r2+r1+ (r2|rz1). If the first connector 30 is not successfully connected to the protection board, the equivalent impedance between the first end of the 1 st resistor R1 and the ground is r1+r2+r1+r2, which indicates that the expansion detection function of the first battery is not in a normal state, that is, an abnormal condition such as a poor contact may occur at this time, or the user does not connect the first connector 30 to the protection board, at this time, the expansion detection of the first battery cannot be performed, and the expansion detection function of the first battery is not in a normal state and may also be referred to as that the first battery is out of place.

In contrast, if the first connector 30 is successfully connected to the protection board and the first battery is expanded, the circuit structure of fig. 3 shows that the equivalent impedance between the first end of the 1 st resistor R1 and ground should be r1+r1+ (r2||rz1).

In a specific embodiment of the present invention, referring to fig. 4, the method may further include:

a second conductive layer 11 attached to the detected surface of the case of the second battery;

a second contact layer 21 provided with N contacts; when the second battery is in a normal state, a certain interval exists between the second contact layer 21 and the second conductive layer 11, and when the second battery expands to enable at least 2 contacts to be in contact with the second conductive layer 11, the contacts in contact with the second conductive layer 11 are in a mutual conduction state;

a second connector 31 connected to the second contact layer 21 and the protection plate, respectively, and the second connector 31 connects the 1 st to nth contacts in the second contact layer 21 to the second ends of the 1 st to nth resistors in sequence;

accordingly, the processing device 40 is specifically configured to: the equivalent impedance between the first end of the 1 st resistor R1 and the ground is detected, and when the first battery and/or the second battery expand, expansion positioning is performed based on the detected equivalent impedance.

In the embodiment of fig. 4, N is set to 4, which is a more common embodiment in practical applications, and the design of 4 contacts can generally cover a large area on the surface to be tested. The processing device 40 and the protective plate are not shown in fig. 3 and 4 for ease of viewing.

As for the expansion detection of the second battery, as is clear from the above description, the principle of the corresponding circuit structure may participate in the above related description about the expansion detection of the first battery, and the description will not be repeated here. It will be appreciated that if there are a greater number of cells in a practical application, expansion detection of these cells may also be achieved. For example, if there is a third battery, a third conductive layer, a third connector and a third contact layer may also be provided for the third battery, and the connection positions of the respective contacts of the third contact layer are described above with reference to the first contact layer 20 and the second contact layer 21, which are electrically equivalent to the parallel connection of three connectors, so as to realize the expansion detection of the third battery.

In addition, in the same manner as described above, when the expansion detection is performed on the second battery, the in-place state detection of the second battery may be further performed, that is, it is determined whether the expansion detection function of the second battery can be normally used, and in the embodiment of fig. 4, a scheme may be adopted, which may further include: the first current limiting resistor RS1, the second current limiting resistor RS2 and the second in-place detection resistor RZ2 are arranged on the protection plate;

The second end of the N-th resistor is connected with the first end of the first current limiting resistor RS1, the second end of the first current limiting resistor RS1 is connected with the first end of the second current limiting resistor RS2, the second end of the second current limiting resistor RS2 is grounded, and the second end of the second in-place detection resistor RZ2 is respectively connected with the second end of the first current limiting resistor RS1 and the first end of the second current limiting resistor RS 2;

the first end of the second in-place detection resistor RZ2 is connected with the first in-place detection end of the second connector 31, and the second end of the second current limiting resistor RS2 is connected with the second in-place detection end of the second connector 31;

in the second connector 31, a first in-place detecting end of the second connector 31 and a second in-place detecting end of the second connector 31 are connected to each other;

correspondingly, the processing device 40 is further configured to: an equivalent impedance between the first end of the 1 st resistor R1 and ground is detected, and it is determined whether or not the swelling detecting function of the second battery is in a normal state based on the detected equivalent impedance.

In this embodiment, the protection plate is provided with the first current limiting resistor RS1, the second current limiting resistor RS2, and the second in-place detecting resistor RZ2 when it is necessary to determine whether the expansion detecting function of the second battery is in a normal state based on the detected equivalent impedance.

However, it will be understood that if it is determined whether the expansion detecting function of the first battery is in a normal state or not, and if it is determined whether the expansion detecting function of the second battery is in a normal state or not, then only the first current limiting resistor RS1, the second current limiting resistor RS2, the first in-place detecting resistor RZ1 and the second in-place detecting resistor RZ2 need to be set, because the first current limiting resistor RS1 and the second current limiting resistor RS2 are common to the first battery and the second battery. Similarly, if a third battery is added as described above, then 1 third in-place detection resistor is added based on the above description, so as to determine whether the expansion detection function of the third battery is in a normal state.

The following describes various cases by taking the circuit configuration of fig. 4 as an example.

Referring to fig. 5a, an equivalent circuit diagram is shown when the first battery and the second battery are both in place and are not inflated, i.e. the first contact layer 20 is successfully connected to the protection board by the first connector 30, the first battery is not inflated, the second contact layer 21 is successfully connected to the protection board by the second connector 31, and the second battery is not inflated, at this time, the equivalent impedance between the first end of the 1 st resistor R1 and the ground is r1+r2+r3+r4+r1+ (r2-l, lz 1-l, RZ 2), in other words, if the equivalent impedance detected by the processing device 40 is equal to the value, it can be determined that both the first battery and the second battery are in place and are not inflated.

See fig. 5b and 5c. Fig. 5b shows an equivalent circuit diagram when the first battery is not in place and the second battery is in place and not expanded, wherein the equivalent impedance between the first end of the 1 st resistor R1 and the ground is r1+r2+r3+r4+r1+ (r2|rz 2), in other words, if the equivalent impedance detected by the processing device 40 is equal to the value, it can be determined that the first battery is not in place, the expansion detection function of the second battery is in a normal state, and the second battery is not expanded.

Fig. 5c shows an equivalent circuit diagram when the second battery is not in place and the first battery is in place and not expanded, wherein the equivalent impedance between the first end of the 1 st resistor R1 and the ground is r1+r2+r3+r4+r1+ (r2|rz 1), in other words, if the equivalent impedance detected by the processing device 40 is equal to the value, it can be determined that the second battery is not in place, the expansion detection function of the first battery is in a normal state, and the first battery is not expanded.

As is clear from the analysis of fig. 5b and 5c, in the case of setting the resistance values of the bit detection resistors corresponding to the respective cells, it is preferable to set the resistance values of the bit detection resistors to be different from each other. For example, the in-place detecting resistor corresponding to the first battery is specifically the first in-place detecting resistor RZ1 in fig. 4, the in-place detecting resistor corresponding to the second battery is specifically the second in-place detecting resistor RZ2 in fig. 4, if the resistance values of RZ2 and RZ1 are the same, the equivalent impedance between the first end of the 1 st resistor R1 and the ground is identical for both cases of fig. 5b and fig. 5c, i.e., the processing means 40 can determine that only 1 battery is out of place at this time, and the expansion detecting function of the other 1 battery is in a normal state and is not expanded, so that the user himself is required to continue checking, thereby discriminating which battery is out of place specifically.

However, if the resistance values of RZ2 and RZ1 are set to be different, the equivalent impedance between the first end of the 1 st resistor R1 and the ground is different for both cases of fig. 5b and fig. 5c, so the processing device 40 can specifically identify which battery is out of place based on the value of the equivalent impedance, and the use experience of the user is improved.

Fig. 5d shows an equivalent circuit schematic diagram of the first battery and the second battery which are not in place, in which the equivalent impedance between the first end of the 1 st resistor R1 and the ground is r1+r2+r3+r4+r1+r2, in other words, if the equivalent impedance detected by the processing device 40 is equal to the value, it can be determined that the 2 batteries are in place, that is, the expansion detection function of the 2 batteries is not in a normal state, and the expansion detection of the 2 batteries cannot be realized.

Referring to fig. 6a, fig. 6a may show that the first battery and the second battery are both in place, and an equivalent circuit diagram of a short circuit condition between the 1 st contact and the 2 nd contact in the first contact layer 20 occurs due to expansion of the first battery, where an equivalent impedance between the first end of the 1 st resistor R1 and the ground is r1+r3+r4+r1+ (r2|rz1|rz2).

And it will be appreciated that if it is the expansion of the second cell, this will result in an equivalent circuit schematic where a short circuit condition between the 1 st contact and the 2 nd contact in the second contact layer 21 occurs, and at this time, the equivalent impedance between the first end of the 1 st resistor R1 and ground is also r1+r3+r4+r1+ (r2|rz1|rz2).

Thus, for the embodiment of fig. 4, if the equivalent impedance detected by the processing means 40 is equal to this value, it can be determined that the first battery and/or the second battery has swelled, and that the area where swelling has occurred is: the corresponding area between the 1 st contact and the 2 nd contact in the first contact layer 20 and/or the corresponding area between the 1 st contact and the 2 nd contact in the second contact layer 21.

Fig. 6b shows an equivalent circuit schematic of a short circuit between the 1 st contact and the 3 rd contact in the first contact layer 20 and/or the second contact layer 21 due to expansion of the first battery and/or the second battery, where the equivalent impedance between the first end of the 1 st resistor R1 and ground is r1+r4+r1+ (r2|rz1|rz2). Thus, for the embodiment of fig. 4, if the equivalent impedance detected by the processing means 40 is equal to this value, it can be determined that the first battery and/or the second battery has swelled, and that the area where swelling has occurred is: corresponding areas between the 1 st contact and the 3 rd contact in the first contact layer 20 and/or the second contact layer 21.

Fig. 6c shows an equivalent circuit schematic of a short circuit between the 3 rd and 4 th contacts in the first and/or second contact layers 20, 21 due to expansion of the first and/or second batteries, where the equivalent impedance between the first end of the 1 st resistor R1 and ground is r1+r2+r3+r1+ (r2|rz1|rz2). Thus, for the embodiment of fig. 4, if the equivalent impedance detected by the processing means 40 is equal to this value, it can be determined that the first battery and/or the second battery has swelled, and that the area where swelling has occurred is: corresponding areas between the 3 rd contact and the 4 th contact in the first contact layer 20 and/or the second contact layer 21.

Similarly, there may be other short-circuit situations between contacts, such as a short-circuit between the 2 nd contact and the 3 rd contact in the first contact layer 20 and/or the second contact layer 21, and a short-circuit between the 1 st contact and the 2 nd contact and a short-circuit between the 3 rd contact and the 4 th contact in the first contact layer 20 and/or the second contact layer 21, which are not illustrated in the drawings.

In one embodiment of the present invention, the processing device 40 may be specifically configured to:

detecting the equivalent impedance between the first end of the 1 st resistor R1 and the ground;

when the equivalent impedance accords with the set normal range, determining that the first battery is in a normal state;

when the equivalent impedance accords with the set kth fault range, determining that the first battery expands, and determining an expansion positioning result corresponding to the kth fault range according to a preset corresponding relation; k is a positive integer.

As described in the above analysis, when the expansion positions of the first cells are different, a short circuit is caused between contacts at the corresponding positions, thereby being represented on the equivalent impedance between the first end of the 1 st resistor R1 and the ground. That is, when the detected values of the equivalent impedances are different, the corresponding expansion conditions can be determined, and the corresponding expansion positioning is realized. While this embodiment further considers that there may be some error in the detected equivalent impedance, 1 corresponding range may be set for different situations so as to allow the value of the detected equivalent impedance to fluctuate within a certain range.

In this embodiment, the normal range and k fault ranges are set, and it is understood that k is a positive integer, and a specific value is affected by the value of N and the resistance value of N resistors, that is, the value of k reflects the number of kinds of various other situations except for the normal situation that each battery is in place and not expanded.

The following table one is a comparison table of the cases set in the embodiment of fig. 4, in which the normal range set is 140.2kΩ -145.0 kΩ, and the rest is 10 abnormal cases, that is, for fig. 4, it is normal that all of the 2 batteries are in place and none of them are expanded, and at this time, the theoretical value of the equivalent impedance between the first end of the 1 st resistor R1 and the ground is 142.6kΩ.

Table one:

further, in one embodiment of the present invention, among the 1 st resistor R1 to the N-th resistor, the resistance values of the remaining N-1 resistors other than the 1 st resistor R1 are different from each other.

Taking the case of fig. 6a and 6c as an example, it is understood from the above analysis description that fig. 6a may be caused by the expansion of the first battery to cause a short circuit between the 1 st contact and the 2 nd contact in the first contact layer 20, where the equivalent impedance between the first end of the 1 st resistor R1 and the ground is r1+r3+r4+r1+ (r2 is rz1-rz2).

Figure 6c may then be the result of the expansion of the first cell such that a short circuit is created between the 3 rd contact and the 4 th contact in the first contact layer 20, at this time, the liquid crystal display device, the equivalent impedance between the first end of the 1 st resistor R1 and ground is R1+R2+R3+R1+ (RS2||RZ 1|RZ 2).

It can be seen that if the resistance values of R2 and R4 are set to be the same, although the scheme of the present application can still be implemented, in such an embodiment, after the processing device 40 detects the equivalent impedance, the expansion positioning result is: the first cell and/or the second cell swells, and the possibility 1 is the "area between the 3 rd contact and the 4 th contact in the first contact layer 20 and/or the second contact layer 21", and the possibility 2 is the "area between the 1 st contact and the 2 nd contact in the first contact layer 20 and/or the second contact layer 21", that is, the swelling positioning can be achieved, but the result of the swelling positioning is blurred.

If the resistance values of the remaining N-1 resistors except the 1 st resistor R1 are set to be different from each other, expansion positioning is facilitated to be performed more precisely, so that when any 2 contacts are short-circuited, the equivalent impedance between the first end of the 1 st resistor R1 and the ground can be accurately distinguished.

In one embodiment of the present application, the processing device 40 may include: a first fixed resistor and processing unit 41;

the first end of the first fixed resistor is connected with the positive electrode of the first power supply, and the second end of the first fixed resistor is connected with the first end of the 1 st resistor R1;

the processing unit 41 is configured to: the method comprises the steps of detecting the voltage between the first end of the 1 st resistor R1 and the ground, determining the equivalent impedance between the first end of the 1 st resistor R1 and the ground based on the voltage of the first power supply and the resistance value of the first fixed resistor, and performing expansion positioning based on the detected equivalent impedance when the first battery expands.

As described above, the processing device 40 of the present application needs to detect the equivalent impedance between the first end of the 1 st resistor R1 and the ground, and various implementations are possible, for example, one implementation is to implement the detection through voltage division, which has a simpler circuit structure and higher reliability.

Referring to fig. 7, which is a schematic diagram of a processing device 40 in an embodiment, the processing unit 41 detects the voltage between the first end of the 1 st resistor R1 and the ground, and the voltage of the first power supply and the resistance value of the first fixed resistor R0 are known, so that the equivalent impedance between the first end of the 1 st resistor R1 and the ground can be determined by the voltage division principle. In fig. 3 and 4 of the present application, the first end of the 1 st resistor R1 is denoted as a voltage detection end, and the detection of the equivalent impedance between the first end of the 1 st resistor R1 and the ground by the processing unit 41 is realized by detecting the voltage between the first end of the 1 st resistor R1 and the ground. The measured partial resistance marked in fig. 7 represents the equivalent impedance between the first end of the 1 st resistor R1 and ground.

In one embodiment of the present invention, at least 1 of the N contacts of the first contact layer 20 are distributed contacts;

for any 1 distributed contact, the distributed contact includes M contact units arranged in the first contact layer 20, the M contact units are connected to each other, and a common end of the connection serves as a connection end of the distributed contact for connecting the first connector 30; m is a positive integer not less than 2.

It will be appreciated that the physical spacing between the contacts is not typically too great to avoid battery swelling, but the contact surface does not contact 2 contacts simultaneously resulting in a missed test condition. Therefore, when the surface area of the detected surface of the first battery is large, one embodiment is to increase the value of N, that is, increase the number of contacts.

However, when the value of N is too large, a large number of resistors need to be provided on the protective plate, and the distinction of the expansion positioning situation is more complicated. In this embodiment, the design of distributed contacts is considered, and the coverage of detection is improved without increasing the number of contacts.

Taking the 3 rd contact of fig. 2 as an example, a distributed contact design is adopted, it can be seen that the 3 rd contact of fig. 2 is formed by 2 circular contact units, the 2 contact units are connected with each other, i.e. the electrical properties of the 2 contact units are identical, and the common end of the 2 contact units is used as the 3 rd contact for connecting with the connection end of the first connector 30.

It can also be seen from this embodiment that the different contacts described in the present application have different electrical properties, i.e. there is normally no electrical connection between the contacts. And 1 contact may be made up of 1 or more contact elements of the same electrical properties.

In addition, in some embodiments, the coverage of the detection may be improved by increasing the area of the contacts, for example, in the embodiment of fig. 2, the 1 st contact and the 4 th contact each take a shape of a larger ellipse.

In one embodiment of the present application, the method may further include: an alarm device coupled to the processing device 40;

the processing means 40 may also be adapted to: when the expansion of the first battery is detected, the first battery is controlled to be powered off, and the alarm device is controlled to alarm.

In this embodiment, the processing device 40 immediately controls the first battery to be powered off, and the specific implementation of the power off can be various, which is not described in the present application. At the same time, the processing device 40 controls the alarm device to alarm, so that the user can notice the situation in time, for example, when the battery expansion detection system of the application is used in the head-mounted device, the user can take off the head-mounted device at the first time through the alarm of the alarm device.

Corresponding to the above embodiments of the battery expansion detection system, embodiments of the present invention also provide a head-mounted device, which may be, for example, a VR device or the like, in which the battery expansion detection system as in any of the above embodiments may be included.

It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The principles and embodiments of the present invention have been described herein with reference to specific examples, but the description of the examples above is only for aiding in understanding the technical solution of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that the present invention may be modified and practiced without departing from the spirit of the present invention.

Claims

1. A battery expansion detection system, comprising:

2. The battery expansion detection system of claim 1, wherein the processing means comprises: a first fixed resistor and a processing unit;

3. The battery expansion detection system of claim 1, wherein the processing device is specifically configured to:

4. The battery expansion detection system according to claim 3, wherein among the 1 st to nth resistors, resistance values of the remaining N-1 resistors other than the 1 st resistor are different from each other.

5. The battery expansion detection system of claim 1, wherein at least 1 of the N contacts of the first contact layer are distributed contacts;

6. The battery expansion detection system according to claim 1, further comprising: an alarm device connected to the processing device;

7. The battery expansion detection system according to claim 1, further comprising: the first current limiting resistor, the second current limiting resistor and the first in-place detection resistor are arranged on the protection plate;

8. The battery expansion detection system according to any one of claims 1 to 7, further comprising:

9. The battery expansion detection system according to claim 8, further comprising: the first current limiting resistor, the second current limiting resistor and the second in-place detection resistor are arranged on the protection plate;

10. A head-mounted device comprising the battery expansion detection system according to any one of claims 1 to 9.