Battery protection module, battery and electronic equipment

Abstract

The utility model provides a battery protection module, a battery and electronic equipment, the battery protection module comprises a circuit board, a first tab connecting piece, a second tab connecting piece and a plurality of flexible circuit board connecting pieces, the first tab connecting piece and the second tab connecting piece are respectively arranged in the middle of the width direction of the circuit board, the first tab connecting piece and the second tab connecting piece are distributed in a central symmetry manner by taking the central point of the first surface as a symmetric center; the plurality of flexible circuit board connecting pieces comprise at least two positive electrode connecting parts and at least two negative electrode connecting parts; the at least two positive electrode connecting parts and the at least two negative electrode connecting parts are distributed in a central symmetry manner by taking the central point of the first surface as a symmetric center; the first end of the flexible circuit board is connected with the circuit board through the connecting part, and the second end of the flexible circuit board is provided with a connector. Through the arrangement, the compatible design of the battery protection module is realized, and the applicability of the battery protection module is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery protection module, a battery, and an electronic device. Background Technology

[0002] A battery consists of cells and a protection board. The cells provide energy, while the protection board protects them. Industry-standard battery designs typically involve a bundled package design where the protection board and cells are integrated. Different charging power levels correspond to different protection design schemes and different specifications of protection boards.

[0003] In electronic devices such as mobile phones, battery protection boards typically use connectors at the ends of flexible circuit boards to engage with connectors on the motherboard, thus achieving electrical connection between the battery protection board and the motherboard. For different models or charging power devices, the location or type of connectors on the motherboard may vary. This makes it difficult for existing battery protection boards to adapt to the motherboards of different electronic devices, affecting their applicability or versatility and hindering the achievement of compatible designs. Utility Model Content

[0004] In view of this, this application provides a battery protection module, a battery, and an electronic device, which can improve the applicability of the battery protection module.

[0005] Specifically, the following technical solutions are included:

[0006] In a first aspect, this application provides a battery protection module, the battery protection module comprising:

[0007] A circuit board, wherein a first electrode connector, a second electrode connector, and a plurality of flexible circuit board connectors are disposed on a first surface of the circuit board. The first electrode connector and the second electrode connector are respectively disposed centrally in the width direction of the circuit board, and the first electrode connector and the second electrode connector are centrally symmetrically distributed with the center point of the first surface as the center of symmetry. The plurality of flexible circuit board connectors are distributed at both ends in the length direction of the first surface. The plurality of flexible circuit board connectors include at least two positive electrode connection portions and at least two negative electrode connection portions, and the at least two positive electrode connection portions and the at least two negative electrode connection portions are centrally symmetrically distributed with the center point of the first surface as the center of symmetry.

[0008] One or more flexible circuit boards, wherein a first end of the flexible circuit board is connected to the circuit board through the positive electrode connection part and the negative electrode connection part, and a connector is provided at the second end.

[0009] In an alternative embodiment, the battery protection module further comprises an electronic device disposed on the first surface and between the first tab connector and the second tab connector.

[0010] In an alternative embodiment, the battery protection module further comprises an injection layer disposed on the side of the circuit board where the first surface is located, and the electronic device is wrapped by the injection layer.

[0011] In an alternative embodiment, the first tab connector is wrapped by the injection layer on a portion of the side close to the electronic device, and the second tab connector is wrapped by the injection layer on a portion of the side close to the electronic device.

[0012] In an alternative embodiment, the battery protection module has a protection circuit comprising a first control chip, a second control chip, a first switch assembly and a second switch assembly.

[0013] The first switch assembly is connected to the positive terminal of the protection circuit and the first control chip respectively, and the first control chip is used to control the on-off of the first switch assembly.

[0014] The second switch assembly is connected to the negative terminal of the protection circuit and the second control chip respectively, and the second control chip is used to control the on-off of the second switch assembly.

[0015] In an alternative embodiment, the protection circuit further comprises a current collection component and a temperature collection component, the current collection component is connected to at least one of the first control chip and the second control chip, and the temperature collection component is connected to at least one of the first control chip and the second control chip.

[0016] In an alternative embodiment, the first switch assembly comprises a first field effect transistor and a second field effect transistor connected in series, the first field effect transistor is connected to the charging control pin of the first control chip, and the second field effect transistor is connected to the discharging control pin of the first control chip.

[0017] The second switch assembly comprises a third field effect transistor and a fourth field effect transistor connected in series, the third field effect transistor is connected to the charging control pin of the second control chip, and the fourth field effect transistor is connected to the discharging control pin of the second control chip.

[0018] In an alternative embodiment, the protection circuit further comprises a fifth field effect transistor, a source terminal of the fifth field effect transistor is connected with the control terminal of the second field effect transistor, a drain terminal of the fifth field effect transistor is connected with the positive terminal of the protection circuit, and a control terminal of the fifth field effect transistor is grounded.

[0019] In a second aspect, the application provides a battery, which comprises a battery cell and the battery protection module provided in any one of the embodiments of the first aspect, the battery cell is provided with a positive tab and a negative tab, the positive tab and the negative tab extend outward from a first end surface of the battery cell, the first tab connector of the battery protection module is connected with the positive tab, and the second tab connector is connected with the negative tab.

[0020] In an alternative embodiment, at least part of the circuit board of the battery protection module covers the first end surface.

[0021] In a third aspect, the application provides an electronic device, which comprises the battery provided in any one of the embodiments of the second aspect.

[0022] The technical scheme provided in the embodiments of the application has at least the following beneficial effects: by arranging the first tab connector and the second tab connector to be centrally arranged along the width direction of the circuit board and to be centrally symmetrically distributed, the distribution positions of the first tab connector and the second tab connector can be exactly reversed after the circuit board is rotated by 180° in the length direction, so that the battery protection module can be adapted to the positions of the positive and negative tabs of different battery cells; since the at least two positive connection portions and the at least two negative connection portions are respectively centrally symmetrically distributed, the circuit board can be connected with the corresponding flexible circuit board through the positive connection portions and the negative connection portions, no matter which end of the circuit board is close to the flexible circuit board adapter of the mainboard connector of the electronic device, and the circuit board can be reliably connected with the flexible circuit board even if the two ends of the circuit board in the length direction are reversed, which realizes the compatible design of the battery protection module, supports the position reversal of the flexible circuit board, and enables the battery protection module to be adapted to the mainboards of different electronic devices, thereby greatly improving the applicability of the battery protection module. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0024] Figure 1 A front view of the battery protection module provided in some embodiments of the application;

[0025] Figure 2A front view of a battery protection module provided for some embodiments of the present application;

[0026] Figure 3 A bottom view of a battery protection module provided for some embodiments of the present application;

[0027] Figure 4 A structure diagram of a protection circuit of a battery protection module provided for some embodiments of the present application;

[0028] Figure 5 A structure diagram of a battery provided for some embodiments of the present application;

[0029] Figure 6 A structure diagram of an electronic device provided for some embodiments of the present application;

[0030] Figure 7 A structure diagram of an electronic device provided for some embodiments of the present application.

[0031] The reference signs in the drawings respectively represent:

[0032] 1 - battery protection module;

[0033] 11 - circuit board; 111 - first surface; 112 - first tab connecting piece; 113 - second tab connecting piece; 114 - flexible circuit board connecting piece; 1141 - positive connecting part; 1142 - negative connecting part;

[0034] 12 - flexible circuit board; 121 - connector;

[0035] 13 - electronic device;

[0036] 14 - injection molding layer;

[0037] 15 - first control chip;

[0038] 16 - second control chip;

[0039] 17 - first switch assembly; 171 - first field effect transistor; 172 - second field effect transistor;

[0040] 18 - second switch assembly; 181 - third field effect transistor; 182 - fourth field effect transistor;

[0041] 19 - current collecting piece;

[0042] 1010 - temperature collecting piece;

[0043] 1020 - fifth field effect transistor;

[0044] 2 - battery cell; 21 - positive tab; 22 - negative tab; 23 - first end face;

[0045] 3-main board;

[0046] 4-middle frame; 41-reinforcing rib.

[0047] The specific embodiments of the present application have been shown and described in the above drawings, and will be described in more detail hereinafter. These drawings and the written description are not intended to restrict the scope of the present application in any way, but to explain the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0049] The positional nouns such as “upper”, “lower”, “lateral” and the like involved in the embodiments of the present application are generally based on the relative relationship of the positions shown in the drawings, and these positional nouns are used only to more clearly describe the structure and the relationship between the structures, and are not intended to describe absolute positions. When the product is placed in different attitudes, the positions may change, for example, “upper” and “lower” may be interchanged.

[0050] Unless otherwise defined, all the technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0051] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0052] As shown in Figures 1 to 3 The battery protection module 1 provided by the embodiments of the present application includes a circuit board 11 and a flexible circuit board 12.

[0053] The first surface 111 of the circuit board 11 is provided with a first tab connecting piece 112, a second tab connecting piece 113 and a plurality of flexible circuit board connecting pieces 114, the first tab connecting piece 112 and the second tab connecting piece 113 are respectively arranged centrally in the width direction of the circuit board 11, and the first tab connecting piece 112 and the second tab connecting piece 113 are centrally symmetrically distributed with the center point of the first surface 111 as the center of symmetry.

[0054] It can be understood that the nouns "first tab connector" and "second tab connector" are used to represent elements for connecting with the positive tab 21 or the negative tab 22 of the battery cell 2, and the first tab connector 112 and the second tab connector 113 can actually be nickel bricks or other conductive elements.

[0055] Exemplarily, the first tab connector 112 is used to connect with the positive tab 21 of the battery cell 2, and the second tab connector 113 is used to connect with the negative tab 22 of the battery cell 2, so as to realize the electrical connection between the battery cell 2 and the circuit board 11. Exemplarily, as shown in Figure 3 , the first tab connector 112 and the second tab connector 113 are both in the shape of rectangular sheets.

[0056] Specifically, the circuit board 11 is in the shape of a rectangular sheet, and the first surface 111 of the circuit board 11 is one surface perpendicular to the thickness direction of the circuit board 11. In the plane where the first surface 111 is located, the first surface 111 has two perpendicular bisectors, and the perpendicular bisector perpendicular to the length direction of the circuit board 11 is referred to as the first perpendicular bisector, and the perpendicular bisector perpendicular to the width direction of the circuit board 11 is referred to as the second perpendicular bisector. It can be understood that the center point of the first surface 111 is the intersection point of the first perpendicular bisector and the second perpendicular bisector, the length direction of the circuit board 11 is the horizontal direction in Figures 1 to 3 , the width direction of the circuit board 11 is the vertical direction in Figure 3 , and the thickness direction of the circuit board 11 is the vertical direction in Figure 1 or Figure 2 .

[0057] By arranging the first tab connector 112 and the second tab connector 113 to be respectively centered in the width direction of the circuit board 11, and arranging the first tab connector 112 and the second tab connector 113 to be centrally symmetrically distributed with the center point of the first surface 111 as the center of symmetry, when the circuit board 11 is rotated by 180° and the positions of the two ends in the length direction are exchanged, the positions of the first tab connector 112 and the second tab connector 113 are just exchanged, that is, the position of the first tab connector 112 after the exchange coincides with the position of the second tab connector 113 before the exchange, and the position of the second tab connector 113 after the exchange coincides with the position of the first tab connector 112 before the exchange, so that the circuit board 11 can be adapted to the normally mounted battery cell 2 and the reversely mounted battery cell 2, and the position of the circuit board 11 before and after the rotation remains unchanged relative to the battery cell 2, thereby realizing the compatible design of the battery protection module 1 to the normally mounted battery cell 2 and the reversely mounted battery cell 2. It can be understood that the difference between the normally mounted battery cell 2 and the reversely mounted battery cell 2 is that the positions of the positive tab 21 and the negative tab 22 of the two battery cells are opposite relative to the main board 3 of the electronic device.

[0058] The plurality of flexible circuit board connecting pieces 114 are distributed at both ends of the length direction of the first surface 111, and the plurality of flexible circuit board connecting pieces 114 include at least two positive connecting portions 1141 and at least two negative connecting portions 1142, and the at least two positive connecting portions 1141 and the at least two negative connecting portions 1142 are respectively distributed in a central symmetry with the center point of the first surface 111 as the center of symmetry.

[0059] It can be understood that the noun "flexible circuit board connecting piece" is used to represent an element for connecting with the flexible circuit board 12, and the flexible circuit board connecting piece 114 can actually be a solder pad, a solder ball or other conductive element.

[0060] The flexible circuit board 12 is one or more, and the first end of the flexible circuit board 12 is connected with the circuit board 11 through the positive connecting portion 1141 and the negative connecting portion 1142, and the second end is provided with a connector 121, and the flexible circuit board 12 is connected with the connector on the main board 3 of the electronic device through the connector 121, so as to establish an electrical connection between the battery cell 2 and the main board 3, and realize the power supply of the battery cell 2 to the main board 3 and the charging of the main board 3 to the battery cell 2.

[0061] Exemplarily, the connector 121 is a board-to-board connector (BTB connector for short).

[0062] Exemplarily, the flexible circuit board connecting piece 114 is a solder pad, the positive connecting portion 1141 is a positive solder pad, and the negative connecting portion 1142 is a negative solder pad, and each flexible circuit board 12 is connected and electrically connected with the circuit board 11 through one positive connecting portion 1141 and one negative connecting portion 1142.

[0063] Specifically, each end of the circuit board 11 in the length direction includes at least one positive connecting portion 1141 and at least one negative connecting portion 1142, so that both ends of the circuit board 11 in the length direction can be connected with the flexible circuit board 12. Exemplarily, as shown in Figure 3 The number of the flexible circuit board connecting pieces 114 is four, and the left end and the right end of the circuit board 11 are respectively provided with two flexible circuit board connecting pieces 114 which are distributed along the width direction of the circuit board 11, wherein the flexible circuit board connecting piece 114 at the upper left corner of the circuit board 11 and the flexible circuit board connecting piece 114 at the lower right corner have the same polarity, for example, both are positive connecting portions 1141; the flexible circuit board connecting piece 114 at the lower left corner of the circuit board 11 and the flexible circuit board connecting piece 114 at the upper right corner have the same polarity, for example, both are negative connecting portions 1142.

[0064] By setting the positive electrode connection 1141 and negative electrode connection 1142 to be centrally symmetrically distributed, after the circuit board 11 is rotated 180°, the overall distribution position of all positive electrode connection 1141 and all negative electrode connection 1142 remains the same as before the rotation. On one hand, regardless of whether the circuit board 11 is paired with a positively mounted battery cell 2 or a reverse-mounted battery cell 2, the flexible circuit board 12 can achieve electrical connection with the circuit board 11 through the positive electrode connection 1141 and the negative electrode connection 1142. On the other hand, the flexible circuit board 12 can be connected to any connector or connector of any type on the main board 3. Regardless of which connector the flexible circuit board 12 is connected to on the main board 3, the flexible circuit board 12 can be connected to the circuit board 11 through the flexible circuit board connector 114 adjacent to one end of itself, for example... Figure 6 As shown, when the flexible circuit board 12 is connected to the connector on the motherboard 3 near the right end of the circuit board 11, the flexible circuit board 12 is connected to the flexible circuit board connector 114 on the right end of the circuit board 11. In other words, the battery protection module 1 provided in this application embodiment realizes a compatible design for connectors in different positions or types on the motherboard 3, supports the interchange of the output positions of the flexible circuit board 12, and facilitates the reasonable setting of the positions of the flexible circuit board 12 and the connector 121 according to the overall stacking requirements.

[0065] In one embodiment, such as Figure 1 As shown, the flexible circuit board 12 is a single unit, suitable for electronic devices with a charging power of 67W and below; or, as... Figure 2 As shown, there are two flexible circuit boards 12, suitable for electronic devices with a charging power of 67W or higher. The number and position of the flexible circuit boards 12 can be set according to actual needs, enabling the battery protection module 1 provided in this embodiment to achieve compatible and reusable designs for charging power levels from 33W to 90W, reducing R&D costs and facilitating faster product updates and iterations.

[0066] The beneficial effects of the technical solutions provided by the embodiments of the present application at least include: by arranging the first tab connecting piece 112 and the second tab connecting piece 113 to be centrally arranged along the width direction of the circuit board 11 and to be centrally symmetrically distributed, the distribution positions of the first tab connecting piece 112 and the second tab connecting piece 113 can be exactly reversed after the circuit board 11 is rotated by 180° to realize the transposition of the two ends in the length direction, so as to adapt to the positions of the positive and negative tabs of different battery cells 2; since the at least two positive connecting parts 1141 and the at least two negative connecting parts 1142 are respectively centrally symmetrically distributed, no matter which end of the flexible circuit board 12 adapted to the connector of the main board 3 of the electronic device is close to the circuit board 11, the circuit board 11 can be connected with the corresponding flexible circuit board 12 through the positive connecting part 1141 and the negative connecting part 1142, that is, even if the two ends of the circuit board 11 in the length direction are transposed, the circuit board 11 can be reliably connected with the flexible circuit board 12, the compatible design of the battery protection module 1 is realized, the position transposition of the flexible circuit board 12 is supported, and the battery protection module 1 can adapt to the main boards 3 of different electronic devices, thereby greatly improving the applicability of the battery protection module 1.

[0067] In a further embodiment, as shown in Figure 3 The battery protection module 1 further includes electronic devices 13, which are arranged on the first surface 111 and located between the first tab connecting piece 112 and the second tab connecting piece 113.

[0068] Specifically, the electronic devices 13 are multiple. For example, the electronic devices 13 include a power gauge, a control chip, a MOS tube, a capacitor, a resistor, etc.

[0069] Arranging the electronic devices 13 on the first surface 111 realizes the single-sided component ultra-thin design, and the electronic devices 13 are located between the first tab connecting piece 112 and the second tab connecting piece 113, so that the space between the first tab connecting piece 112 and the second tab connecting piece 113 is fully utilized, and through the above arrangement, the space occupied by the battery protection module 1 in the battery compartment can be reduced, which is beneficial to increasing the capacity of the battery cell 2, wherein the battery compartment is a space defined in the electronic device and used for accommodating the battery.

[0070] For example, the electronic devices 13 are attached to the first surface 111 by using the surface mount technology (SMT), and are bonded to the first surface 111 by using an underfill adhesive.

[0071] In a further embodiment, the battery protection module 1 further includes an injection molding layer 14, which is located on the side of the circuit board 11 where the first surface 111 is located, and the electronic devices 13 are wrapped by the injection molding layer 14.

[0072] Exemplarily, the electronic devices 13 on the first surface 111 are encapsulated by injection molding material such as epoxy resin to form an injection molding layer 14.

[0073] Since the thickness of the circuit board 11 is usually small, the strength of the circuit board 11 can be improved by arranging the injection molding layer 14 to prevent the circuit board 11 from warping or being damaged by force.

[0074] Further, the part of the first tab connecting piece 112 close to the electronic devices 13 is encapsulated by the injection molding layer 14, and the part of the second tab connecting piece 113 close to the electronic devices 13 is encapsulated by the injection molding layer 14.

[0075] As shown in Figure 3 The injection molding layer 14 not only encapsulates the plurality of electronic devices 13, but also encapsulates the right end of the left tab connecting piece and the left end of the right tab connecting piece.

[0076] By this arrangement, the structural strength of the weak area of the circuit board 11 between the first tab connecting piece 112 / second tab connecting piece 113 and the electronic devices 13 can be improved to avoid the circuit board 11 from being broken at the weak area and affect the normal use of the battery protection module 1.

[0077] Optionally, the electronic devices 13 and part of the tab connecting pieces are injection molded by using a SIP (System in a Package) process.

[0078] The battery protection module 1 has a protection circuit, which includes a first control chip 15, a second control chip 16, a first switch assembly 17, and a second switch assembly 18. As shown in Figure 4 The first control chip 15 is denoted as U1, and the second control chip 16 is denoted as U2.

[0079] The first switch assembly 17 is connected to the first control chip 15 and the positive terminal of the protection circuit, respectively. The first control chip 15 is used to control the on-off of the first switch assembly 17 to turn on or turn off the charge-discharge circuit of the battery cell 2.

[0080] The second switch assembly 18 is connected to the second control chip 16 and the negative terminal of the protection circuit, respectively. The second control chip 16 is used to control the on-off of the second switch assembly 18 to turn on or turn off the charge-discharge circuit of the battery cell 2.

[0081] Exemplarily, the first control chip 15 and the second control chip 16 are protection ICs (integrated circuits, ICs) that can monitor the charge-discharge state of the battery cell 2 and control the working state of the battery cell 2. The first control chip 15 is a protection IC integrated with a power meter.

[0082] like Figure 4 As shown, Cell represents cell 2, P+ and B+ are the positive terminals of the protection circuit, P+ represents the positive port of connector 121, used to connect to the positive terminal of the external power supply, and B+ represents the positive port of cell 2; P- and B- are the negative terminals of the protection circuit, P- represents the negative interface of connector 121, used to connect to the negative terminal of the external power supply, and B- represents the negative interface of cell 2.

[0083] In this embodiment, the first switch assembly 17 is connected to the positive terminal of the protection circuit, and the second switch assembly 18 is connected to the negative terminal of the protection circuit, forming a high-low side protection architecture. Compared with the battery protection board that adopts a dual low-side protection architecture in the prior art, it can ensure that a good ground reference is always maintained through high-side protection to avoid potential safety and communication failures in the event of a short circuit, and can also achieve simple control and reduce power consumption through low-side protection.

[0084] Furthermore, the protection circuit also includes a current acquisition device 19 and a temperature acquisition device 1010. The current acquisition device 19 is connected to at least one of the first control chip 15 and the second control chip 16, and the temperature acquisition device 1010 is connected to at least one of the first control chip 15 and the second control chip 16.

[0085] Specifically, the first control chip 15 and / or the second control chip 16 are connected to the current acquisition device 19 to obtain the current or voltage of the current acquisition device 19, thereby calculating the charging and discharging current in the charging and discharging circuit, obtaining the current state of the battery cell 2, and then controlling the conduction and disconnection of the charging and discharging circuit.

[0086] For example, RS is a current acquisition element 19, specifically a precision resistor.

[0087] like Figure 4 As shown, the RSP pin of the first control chip 15 is connected to the resistor R10, and the RSN pin of the first control chip 15 is connected to the resistor R11. The two ends of the resistor RS are connected to the resistor R10 and the resistor R11 respectively. The first control chip 15 can obtain the voltage carried by the resistor RS through the RSN pin and the RSP pin, and then calculate the charging and discharging current of the charging and discharging circuit based on the resistance value and voltage of the resistor RS.

[0088] For example, the CS pin of the second control chip 16 is connected to one end of the resistor RS, and the VSS pin of the second control chip 16 is grounded. The second control chip 16 can obtain the potential of one end of the resistor RS through the CS pin and obtain the potential of the other end of the resistor RS through the VSS pin, thereby obtaining the voltage carried by the resistor RS, and then calculating the charging and discharging current of the charging and discharging circuit based on the resistance value and voltage of the resistor RS.

[0089] Specifically, the first control chip 15 and / or the second control chip 16 are connected to the temperature acquisition device 1010 to obtain the internal temperature of the electronic device, thereby controlling the conduction and cutoff of the charging and discharging circuit according to the temperature to prevent the battery cell 2 from being charged at a high temperature and causing damage.

[0090] For example Figure 4 As shown, RT is a temperature acquisition device 1010, specifically a thermistor. The TS1 pin of the first control chip 15 is connected to the resistor RT. When the temperature inside the electronic device changes, the resistor RT can sense the temperature change and change its resistance value accordingly. Combining the correspondence between the voltage and temperature at the TS1 pin of the first control chip 15, the first control chip 15 can determine the temperature inside the electronic device, and thus control the conduction and cutoff of the charging and discharging circuit according to the temperature.

[0091] In a further embodiment, the first switching assembly 17 includes a first field-effect transistor 171 and a second field-effect transistor 172 connected in series. The first field-effect transistor 171 is connected to the charging control pin of the first control chip 15, and the second field-effect transistor 172 is connected to the discharging control pin of the first control chip 15.

[0092] The second switching assembly 18 includes a third field-effect transistor 181 and a fourth field-effect transistor 182 connected in series. The third field-effect transistor 181 is connected to the charging control pin of the second control chip 16, and the fourth field-effect transistor 182 is connected to the discharging control pin of the second control chip 16.

[0093] like Figure 4 As shown, the first field-effect transistor 171 to the fourth field-effect transistor 182 are represented by Q1 to Q4 respectively, and the first field-effect transistor 171 to the fourth field-effect transistor 182 are power N-MOS.

[0094] The charging control pin of the first control chip 15 is the CHG pin, the discharging control pin of the first control chip 15 is the DSG pin, the charging control pin of the second control chip 16 is the CO pin, the discharging control pin of the second control chip 16 is the DO pin, the first field-effect transistor 171 and the third field-effect transistor 181 control the on / off state of the charging circuit, and the second field-effect transistor 172 and the fourth field-effect transistor 182 control the on / off state of the discharging circuit.

[0095] Specifically, under normal conditions, the CHG and DSG pins of the first control chip 15 output high levels, the first field-effect transistor 171 / second field-effect transistor 172 are in the on state, and the charging / discharging circuit is in the on state; under normal conditions, the CO and DO pins of the second control chip 16 output high levels, the third field-effect transistor 181 / fourth field-effect transistor 182 are in the on state, and the charging / discharging circuit is in the on state.

[0096] Specifically, the protection circuit is divided into primary protection and secondary protection. The first control chip 15 is the main control IC for primary protection, and the second control chip 16 is the main control IC for secondary protection. As abnormalities occur in the voltage, current and temperature of the battery cell 2, the primary protection will work first, and the charging and discharging circuit will be controlled by the first field-effect transistor 171 and the second field-effect transistor 172.

[0097] Furthermore, the protection circuit also includes a fifth field-effect transistor 1020, such as Figure 4 As shown, the fifth field-effect transistor 1020 is represented by Q5. The source terminal of the fifth field-effect transistor 1020 is connected to the control terminal of the second field-effect transistor 172, the drain terminal of the fifth field-effect transistor 1020 is connected to the positive terminal of the protection circuit, and the control terminal of the fifth field-effect transistor 1020 is grounded.

[0098] For example, the fifth field-effect transistor 1020 is a signal N-MOS, which plays a role in preventing reverse connection and can avoid the circuit from burning out due to reverse connection of P+ and P- power supply.

[0099] like Figure 5 As shown, this application also provides a battery, including a battery cell 2 and a battery protection module 1 provided in any of the above embodiments. The battery cell 2 is provided with a positive tab 21 and a negative tab 22. The positive tab 21 and the negative tab 22 extend outward from the first end face 23 of the battery cell 2. The first tab connector 112 of the battery protection module 1 is connected to the positive tab 21, and the second tab connector 113 is connected to the negative tab 22.

[0100] For example, the first tab connector 112 is connected to the positive tab 21 and the second tab connector 113 is connected to the negative tab 22 by welding, thereby electrically connecting the battery protection module 1 and the battery cell 2.

[0101] Furthermore, at least a portion of the circuit board 11 of the battery protection module 1 covers the first end face 23.

[0102] That is, the circuit board 11 is parallel to the first end surface 23 or slightly inclined to the first end surface 23, the circuit board 11 can be stacked with the first end surface 23, save the space occupied by the battery protection module 1 at the head of the battery cell 2, minimize the battery protection module 1 to occupy the space of the battery compartment, maximize the use of the space of the battery compartment by the battery cell 2, compared with the design of the battery protection plate perpendicular to the end surface of the battery cell 2 in the conventional scheme, can increase the capacity of the battery, improve the endurance of the electronic equipment.

[0103] As shown in Figure 6 or Figure 7 The application also provides an electronic device, which comprises the battery provided by any of the above embodiments.

[0104] The electronic device includes but is not limited to mobile phones, tablet computers, notebook computers, personal digital assistants, e-book readers, wearable devices, navigation devices, palm game consoles, virtual and reality devices, augmented reality devices, etc.

[0105] Specifically, the electronic device further comprises a mainboard 3 and a middle frame 4, the middle frame 4 is used to provide mounting space and support for parts of the electronic device, as shown in Figure 6 or Figure 7 The mainboard 3 and the battery are both mounted on the middle frame 4.

[0106] The middle frame 4 is provided with a reinforcing rib 41 extending along the width direction of the electronic device, and the battery protection module 1 is located between the reinforcing rib 41 and the battery cell 2. Wherein, the width direction of the electronic device is Figure 6 or Figure 7 horizontal direction in

[0107] The mainboard 3 is provided with one or more connectors. As shown in Figure 6 in the case of one connector on the mainboard 3, the battery protection module 1 is buckled with the connector on the mainboard through one connector 121; as shown in Figure 7 in the case of two connectors on the mainboard 3, the battery protection module 1 is buckled with the connector on the mainboard through two connectors 121.

[0108] In the present application, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" means two or more, unless otherwise explicitly limited.

[0109] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The application is intended to cover any variations, uses or adaptive changes of the application following the general principles of the application and including those expressly disclosed in the specification or inherently related to the technical field of the application. The specification and examples are only considered as exemplary.

[0110] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A battery protection module (1), characterized in that, The battery protection module (1) includes: A circuit board (11) is provided with a first tab connector (112), a second tab connector (113), and a plurality of flexible circuit board connectors (114) on its first surface (111). The first tab connector (112) and the second tab connector (113) are respectively centrally located in the width direction of the circuit board (11), and the first tab connector (112) and the second tab connector (113) are centrally symmetrically distributed with the center point of the first surface (111) as the center of symmetry. The plurality of flexible circuit board connectors (114) are distributed at both ends in the length direction of the first surface (111). The plurality of flexible circuit board connectors (114) include at least two positive electrode connection portions (1141) and at least two negative electrode connection portions (1142). The at least two positive electrode connection portions (1141) and the at least two negative electrode connection portions (1142) are centrally symmetrically distributed with the center point of the first surface (111) as the center of symmetry. One or more flexible circuit boards (12), the first end of the flexible circuit board (12) is connected to the circuit board (11) through the positive electrode connection part (1141) and the negative electrode connection part (1142), and the second end is provided with a connector (121).

2. The battery protection module (1) according to claim 1, characterized in that, The battery protection module (1) further includes an electronic device (13), which is disposed on the first surface (111) and located between the first tab connector (112) and the second tab connector (113).

3. The battery protection module (1) according to claim 2, characterized in that, The battery protection module (1) also includes an injection molding layer (14), which is located on the side of the first surface (111) on the circuit board (11), and the electronic device (13) is wrapped by the injection molding layer (14).

4. The battery protection module (1) according to claim 3, characterized in that, A portion of the first tab connector (112) near the electronic device (13) is covered by the injection molding layer (14), and a portion of the second tab connector (113) near the electronic device (13) is also covered by the injection molding layer (14).

5. The battery protection module (1) according to claim 1, characterized in that, The battery protection module (1) has a protection circuit, which includes a first control chip (15), a second control chip (16), a first switch assembly (17), and a second switch assembly (18). The first switch assembly (17) is connected to the positive terminal of the first control chip (15) and the protection circuit respectively. The first control chip (15) is used to control the on / off state of the first switch assembly (17). The second switch assembly (18) is connected to the negative terminal of the second control chip (16) and the protection circuit respectively. The second control chip (16) is used to control the on / off state of the second switch assembly (18).

6. The battery protection module (1) according to claim 5, characterized in that, The protection circuit further includes a current acquisition device (19) and a temperature acquisition device (1010), wherein the current acquisition device (19) is connected to at least one of the first control chip (15) and the second control chip (16), and the temperature acquisition device (1010) is connected to at least one of the first control chip (15) and the second control chip (16).

7. The battery protection module (1) according to claim 5, characterized in that, The first switching assembly (17) includes a first field-effect transistor (171) and a second field-effect transistor (172) connected in series. The first field-effect transistor (171) is connected to the charging control pin of the first control chip (15), and the second field-effect transistor (172) is connected to the discharging control pin of the first control chip (15). The second switching assembly (18) includes a third field-effect transistor (181) and a fourth field-effect transistor (182) connected in series. The third field-effect transistor (181) is connected to the charging control pin of the second control chip (16), and the fourth field-effect transistor (182) is connected to the discharging control pin of the second control chip (16).

8. The battery protection module (1) according to claim 7, characterized in that, The protection circuit also includes a fifth field-effect transistor (1020), the source terminal of which is connected to the control terminal of the second field-effect transistor (172), the drain terminal of which is connected to the positive terminal of the protection circuit, and the control terminal of which is grounded.

9. A battery, characterized in that, The battery includes a cell (2) and a battery protection module (1) according to any one of claims 1 to 8. The cell (2) is provided with a positive tab (21) and a negative tab (22). The positive tab (21) and the negative tab (22) extend outward from the first end face (23) of the cell (2). The first tab connector (112) of the battery protection module (1) is connected to the positive tab (21), and the second tab connector (113) is connected to the negative tab (22).

10. The battery according to claim 9, characterized in that, At least a portion of the circuit board (11) of the battery protection module (1) covers the first end face (23).

11. An electronic device, characterized in that, The electronic device includes the battery as described in claim 9 or 10.

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