CN217387455U - Battery and electronic equipment - Google Patents

Battery and electronic equipment Download PDF

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Publication number
CN217387455U
CN217387455U CN202221102492.1U CN202221102492U CN217387455U CN 217387455 U CN217387455 U CN 217387455U CN 202221102492 U CN202221102492 U CN 202221102492U CN 217387455 U CN217387455 U CN 217387455U
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CN
China
Prior art keywords
pole
protection switch
switch module
battery
protection
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Active
Application number
CN202221102492.1U
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Chinese (zh)
Inventor
周继浩
李康泉
蔡小丽
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BYD Co Ltd
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BYD Co Ltd
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Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN202221102492.1U priority Critical patent/CN217387455U/en
Application granted granted Critical
Publication of CN217387455U publication Critical patent/CN217387455U/en
Priority to PCT/CN2023/086305 priority patent/WO2023216774A1/en
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Anticipated expiration legal-status Critical

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/519—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The utility model relates to a battery and electronic equipment, this battery includes electric core, the protection circuit board, first utmost point connecting piece and second utmost point connecting piece, this electric core has first utmost point ear and second utmost point ear, the protection circuit board package rubbing board body and first protection switch module and the second protection switch module of setting on the plate body, the integration has first circuit on the plate body, second circuit and third circuit, first protection switch module sets up on first circuit, second protection switch module sets up on the second circuit, first utmost point connecting piece and first utmost point ear all connect in the plate body, and first utmost point connecting piece and first utmost point ear are connected through the first circuit and the second circuit electricity that connect in parallel each other, second utmost point connecting piece and second utmost point ear all connect in the plate body, and second utmost point connecting piece and second utmost point ear are connected through the third circuit electricity. The battery can realize large-current quick charging, reduces the number of lines on the protection circuit board, reduces the complexity of wiring of the lines on the protection circuit board, and is favorable for reducing the overall size of the battery.

Description

Battery and electronic equipment
Technical Field
The present disclosure relates to the field of batteries, and in particular, to a battery and an electronic device.
Background
In the related art, the battery in the electronic device has an increased overall volume due to the large size of the PCB inside the battery, and occupies valuable space in the electronic device. The reason that the volume of the PCB is large is that the routing on the PCB is complex and the insulation requirement between circuits is high. Specifically, for example, in a battery in the related art, since the battery has two external ports, and each external port is provided with a positive terminal and a negative terminal, the positive tab of the battery cell needs to be electrically connected to the positive terminals on the two external ports through two positive lines on the PCB, and the negative tab of the battery cell needs to be electrically connected to the positive terminals on the two external ports through two negative lines on the PCB, thereby resulting in a large number of lines on the PCB, complicated routing, high insulation requirements between the lines, and further requiring an increase in the size of the PCB to meet the routing and insulation requirements of the internal lines.
SUMMERY OF THE UTILITY MODEL
The present disclosure is directed to a battery and an electronic device to solve the problems of the related art.
In order to achieve the above object, the present disclosure provides a battery including:
the battery cell is provided with a first lug and a second lug;
the protection circuit board comprises a board body, and a first protection switch module and a second protection switch module which are arranged on the board body, wherein a first circuit, a second circuit and a third circuit are integrated on the board body, the first protection switch module is arranged on the first circuit, and the second protection switch module is arranged on the second circuit;
the first pole connecting piece and the first pole lug are connected to the plate body and are electrically connected through the first circuit and the second circuit which are connected in parallel;
the second pole connecting piece and the second pole lug are connected to the plate body, and the second pole connecting piece and the second pole lug are electrically connected through the third circuit;
the first tab is a positive tab, the second tab is a negative tab, the first pole connecting piece is a positive pole connecting piece, and the second pole connecting piece is a negative pole connecting piece; or, the first tab is a negative tab, the second tab is a positive tab, the first pole connecting piece is a negative pole connecting piece, and the second pole connecting piece is a positive pole connecting piece.
Optionally, the first line and the second line are both non-intersecting with the third line.
Optionally, the first tab and the second tab are spaced apart along the length direction of the plate body, the first pole connecting piece and the second pole connecting piece are spaced apart along the length direction of the plate body, the first tab and the first pole connecting piece are located on two sides of the plate body in the width direction and are collinear in the width direction of the plate body, and the second tab and the second pole connecting piece are located on two sides of the plate body in the width direction and are collinear in the width direction of the plate body;
the plate body has first surface and second surface along its thickness direction, first utmost point ear with the second utmost point ear all is connected to the first surface, first protection switch module with the setting of second protection switch module is in on the second surface, first protection switch module with the second protection switch module is followed the length direction of plate body is located first utmost point ear reaches the both sides of first utmost point connecting piece.
Optionally, the first protection switch module and the second protection switch module both include a primary protection switch and a secondary protection switch that are arranged at intervals along the length direction of the plate body, the primary protection switch of the first protection switch module is arranged close to the first tab and the first pole connecting piece relative to the secondary protection switch of the first protection switch module, and the primary protection switch of the second protection switch module is arranged close to the first tab and the first pole connecting piece relative to the secondary protection switch of the second protection switch module;
the first-stage protection switch and the second-stage protection switch of the first protection switch module are connected in series on the first line, and the first-stage protection switch and the second-stage protection switch of the second protection switch module are connected in series on the second line.
Optionally, a second pole pad is disposed on the first surface, the second tab is electrically connected to the second pole pad, the second pole connecting member has a connecting portion connected to the inside of the board, the connecting portion is arranged in the thickness direction of the board along the second pole pad, a projection of the second pole pad on the thickness direction of the board at least partially overlaps with a projection of the connecting portion on the thickness direction, and the third line extends in the thickness direction of the board and connects the second pole pad to the connecting portion.
Optionally, the connection portion is located between the first surface and the second surface.
Optionally, the protection circuit board further includes a first protection control module and a second protection control module, the first protection control module and the second protection control module are disposed on the second surface, along the length direction of the board body, the first protection switch module and the second protection switch module are located between the first protection control module and the second protection control module, and the first protection control module and the second protection control module are electrically connected with the first protection switch module and the second protection switch module.
Optionally, the battery further comprises an insulating and thermally conductive layer covering the second surface, the first protection switch module, and the second protection switch module.
Optionally, a first pole pad electrically connected to the first tab and a second pole pad electrically connected to the second tab are disposed on the board body, the first pole pad and the second pole pad are both formed in a U-shaped structure and each include a first side plate and a second side plate that are oppositely disposed, the first side plate is connected to the plate body, the first tab is at least partially sandwiched between the first side plate of the first pole pad and the second side plate of the first pole pad, the second pole lug is at least partially sandwiched between the first side plate of the second pole pad and the second side plate of the second pole pad, the first pole pad and the first pole connecting member are electrically connected by the first line and the second line connected in parallel to each other, the second pole pad is electrically connected with the second pole connecting piece through the third circuit.
Optionally, the width of the protection circuit board ranges from 3mm to 25 mm.
The present disclosure also provides an electronic device, including the above battery, a first pole connecting piece of the battery is connected with a first pole connecting end of the electronic device, and a second pole connecting piece of the battery is connected with a second pole connecting end of the electronic device.
The battery provided by the disclosure can meet the requirement of large-current quick charging, and meanwhile, the number of lines on the protection circuit board can be reduced, the wiring complexity and the insulation requirement of the lines on the protection circuit board are reduced, and the whole volume of the battery is favorably reduced, so that the unit volume energy ratio of the battery is improved, and the arrangement of the battery is convenient.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is an exploded view of a battery provided in an exemplary embodiment of the present disclosure;
fig. 2 is a perspective view of a protection circuit board, a first pole connector and a second pole connector of a battery provided in an exemplary embodiment of the present disclosure;
fig. 3 is an exploded view of a battery provided by an exemplary embodiment of the present disclosure from another perspective;
fig. 4 is a top view of a battery provided by an exemplary embodiment of the present disclosure;
fig. 5 is a bottom view of a battery provided by an exemplary embodiment of the present disclosure;
fig. 6 is a sectional view taken along the line "a-a" in fig. 5.
Description of the reference numerals
1-electric core; 11-a first tab; 12-a second tab; 2-protection circuit board; 21-a plate body; 22-a first surface; 221-second pole pad; 222-a first pole pad; 223-a first side panel; 224-a second side panel; 23-a second surface; 24-a first protection switch module; 25-a second protection switch module; 26-a primary protection switch; 27-a secondary protection switch; 28-a first protection control module; 29-a second protection control module; 3-a first line; 4-a second line; 5-a third line; 6-a first pole connection; 7-a second pole connection; 71-a connecting part; 8-an insulating heat conducting layer; 9-insulating mounting bracket.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise specified, the use of an orientation word such as "longitudinal direction" refers to the longitudinal direction as shown in fig. 2, "width direction" refers to the width direction as shown in fig. 2, and "inner and outer" refer to the inner and outer of the profile of the relevant component. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.
As shown in fig. 1 to 6, the present disclosure provides a battery including a battery cell 1, a protection circuit board 2, a first pole connector 6 and a second pole connector 7, the battery cell 1 is provided with a first tab 11 and a second tab 12, the protection circuit board 2 comprises a board body 21 and a first protection switch module 24 and a second protection switch module 25 which are arranged on the board body 21, a first line 3, a second line 4 and a third line 5 are integrated on the board body 21, the first protection switch module 24 is arranged on the first line 3, the second protection switch module 25 is arranged on the second line 4, the first tab connecting piece 6 and the first tab 11 are both connected to the board body 21, and the first pole connecting piece 6 and the first pole ear 11 are electrically connected through the first line 3 and the second line 4 which are mutually connected in parallel, the second pole connecting piece 7 and the second pole ear 12 are both connected to the plate body 21, and the second pole connecting piece 7 and the second pole ear 12 are electrically connected through the third line 5.
The first tab 11 may be a positive tab, the second tab 12 may be a negative tab, the first tab connector 6 may be a positive tab connector, and the second tab connector 7 may be a negative tab connector. Alternatively, the first tab 11 may be a negative tab, the second tab 12 may be a positive tab, the first pole connector 6 may be a negative connector, and the second pole connector 7 may be a positive connector.
In the above battery, the first tab 11 of the battery cell 1 is connected to the first pole connecting member 6 through the first line 3 and the second line 4 which are connected in parallel, the current can be shunted to the first line 3 and the second line 4 which are connected in parallel, the first protection switch module 24 is arranged on the first line 3, the second protection switch module 25 is arranged on the second line 4, the current in the first line 3 and the second line 4 can be subjected to overcurrent protection, and the problem that the battery temperature is too high due to the fact that the current in the first line 3 and the second line 4 is too large is avoided. And, because first circuit 3 and second circuit 4 are parallelly connected each other, when the battery discharges, the electric current in first circuit 3 and the second circuit 4 can be passed through first utmost point connecting piece 6 and is given the equipment that needs be supplied power, and when the battery charges, the electric current can be simultaneously through first circuit 3 and second circuit 4 to electric core charging to allow the heavy current to pass through, realize the quick charge of battery, improve the charge efficiency of battery.
With the first utmost point ear of electric core in the correlation technique need be through two different first utmost point terminals of line connection, the second utmost point ear of electric core needs the technical scheme of two different second utmost point terminals of line connection through two lines and compares, in the battery that this disclosure provided, first utmost point ear 11 of electric core 1 is through first circuit 3 and 4 lug connection in same first utmost point connecting piece 6 of second line, second utmost point ear 12 of electric core 1 connects in second utmost point connecting piece 7 through third line 5, the circuit quantity on protective circuit board 2 has been reduced, the line degree of difficulty and the insulating demand of walking of the integrated circuit on the protective circuit board 2 have been reduced, thereby be of value to reducing the size of protective circuit board 2, and then reduce the whole volume of battery, increase the unit volume energy ratio of battery. In addition, the reduction of the number of the lines on the protection circuit board 2 can also reduce the impedance of a battery loop, improve the overcurrent capacity of the battery and be beneficial to realizing the quick charging of the battery.
In addition, the first pole connecting piece 6 and the second pole connecting piece 7 are independent of each other and are used for unidirectional current transmission, and the internal conducting circuits of the first pole connecting piece 6 and the second pole connecting piece 7 do not need to be insulated any more, so that the size of the first pole connecting piece 6 and the second pole connecting piece 7 can be reduced, and the whole volume of the battery is reduced.
In conclusion, the battery provided by the disclosure can meet the requirement of large-current quick charging, and meanwhile, the number of lines on the protection circuit board 2 can be reduced, the complexity and the insulation requirement of line routing on the protection circuit board 2 are reduced, and the overall size of the battery is favorably reduced, so that the energy ratio of the unit volume of the battery is improved, and the arrangement of the battery is convenient.
In the above battery, the first line 3, the second line 4, and the third line 5 may be any structures such as printed conductive traces on the protection circuit board 2 or conductive cores on the protection circuit board 2, and the disclosure does not limit the specific structures of the first line 3, the second line 4, and the third line 5.
In order to reduce the insulation requirements between the first line 3 and the second line 4 and the third line 5, optionally, the first line 3 and the second line 4 may both be non-crossing with the third line 5, i.e. the first line 3 and the second line 4 are both non-overlapping with the third line 5 in a spatial arrangement, e.g. as shown in fig. 4, the dashed line a in fig. 4 exemplarily shows the circulation path of the current between the second pole ear 12 and the second pole connector 7, the dashed line b exemplarily shows the circulation path of the current between the first pole ear 11 and the first pole connector 6, the circulation path of the current between the second pole ear 12 and the second pole connector 7 and the circulation path of the current between the first pole ear 11 and the first pole connector 6 are non-crossing with each other, i.e. the first line 3 and the second line 4 are both non-crossing with the third line 5 in space, on the one hand, the possibility of short circuit between the first line 3 and the second line 4 and the third line 5 can be reduced, on the other hand, the insulation requirement between the first line 3 and the third line 5 and the insulation requirement between the second line 4 and the third line 5 can be reduced, the occupied volume of the insulation material on the protection circuit board 2 is avoided, the whole size of the protection circuit board 2 is favorably reduced, and therefore the whole volume of the battery is reduced.
The size of the plate body 21 in the length direction is larger than that of the plate body 21 in the width direction, the first line 3, the second line 4 and the third line 5 are integrated on the plate body 21, and the longer the lengths of the first line 3, the second line 4 and the third line 5 are, the larger the resistance is, the more heat is generated in the charging process, and in order to avoid overhigh temperature of the battery, the shorter the lengths of the first line 3, the second line 4 and the third line 5 are, the more the improvement of the battery performance is facilitated. As an exemplary embodiment, as shown in fig. 4 and 5, the first tab 11 and the second tab 12 may be spaced apart along the length direction of the plate body 21, and the first pole connecting member 6 and the second pole connecting member 7 may be spaced apart along the length direction of the plate body 21, wherein the first tab 11 and the first pole connecting member 6 are located on both sides of the width direction of the plate body 21 and are collinear in the width direction of the plate body 21, where collinear means that at least one straight line extending along the width direction of the plate body 21 can simultaneously fall within the projection of the first tab 11 and the first pole connecting member 6 in the thickness direction of the plate body 21. Because the first tab 11 and the first pole connecting piece 6 are collinear in the width direction of the plate body 21, the distance between the first tab 11 and the first pole connecting piece 6 is short, the lengths of the first line 3 and the second line 4 can be shortened, and the resistances of the first line 3 and the second line 4 are reduced. The second pole tab 12 and the second pole connecting piece 7 are located on two sides of the plate body 21 in the width direction and are collinear in the width direction of the plate body 21, that is, at least one straight line extending along the width direction of the plate body 21 can simultaneously fall in the projection of the second pole tab 12 and the second pole connecting piece 7 in the thickness direction of the plate body 21, the distance between the second pole tab 12 and the second pole connecting piece 7 is short, the length of the third circuit 5 can be shortened, and therefore the resistance of the third circuit 5 is reduced.
In the above embodiment, the first protection switch 24, the second protection switch module 25, the connection position of the first tab 11 and the plate body 21, and the connection position of the second tab 12 and the plate body 21 may all be located on the same surface of the plate body 21, or the first protection switch 24, the second protection switch module 25, the connection position of the first tab 11 and the plate body 21, and the connection position of the second tab 12 and the plate body 21 may be located on different surfaces of the plate body 21. In order to reduce the size of the plate body 21 and facilitate the arrangement of the first protection switch module 24 and the second protection switch module 25, optionally, as shown in fig. 1 to 3, the plate body 21 may have a first surface 22 and a second surface 23 along the thickness direction thereof, the first tab 11 and the second tab 12 are both connected to the first surface 22, the first protection switch module 24 and the second protection switch module 25 are disposed on the second surface 23, and the first protection switch module 24 and the second protection switch module 25 are located on both sides of the first tab 11 and the first pole connecting member 6 along the length direction of the plate body 21. The first tab 11 and the second tab 12 are connected to the first surface 22, and the first protection switch module 24 and the second protection switch module 25 are disposed on the second surface 23, so that the surface of the protection circuit board 2 can be fully utilized, and the overall volume of the protection circuit board 2 is reduced. The first protection switch module 24 and the second protection switch module 25 are located on two sides of the first tab 11 and the first pole connecting piece 6 along the length direction of the plate body 21, so that a certain interval is formed between the first protection switch module 24 and the second protection switch module 25, heat dissipation of the first protection switch module 24 and the second protection switch module 25 is facilitated, and the problems that the battery temperature is too high due to heat accumulation of the first protection switch module 24 and the second protection switch module 25 are solved. And, first protection switch module 24 and second protection switch module 25 are located the both sides of first utmost point ear 11 and first utmost point connecting piece 6 along the length direction of plate body 21, can be convenient for first line 3 and second line 4's arrangement, first protection switch module 24 sets up on first line 3, second protection switch module 25 sets up on second line 4, then first line 3 and second line 4 are located the both sides of first utmost point ear 11 and first utmost point connecting piece 6 along the length direction of plate body 21, first line 3 and second line 4 do not intersect and overlap, can avoid taking place the short circuit between first line 3 and the second line 4, thereby reduce the insulation demand between first line 3 and the second line 4, be convenient for reduce the volume of protection circuit board 2.
In order to shorten the length of the third wire 5, as shown in fig. 5 and 6, optionally, a second pole pad 221 is disposed on the first surface 22, the second pole lug 12 is electrically connected to the second pole pad 221, the second pole connector 7 has a connecting portion 71 connected to the board body 21, the connecting portion 71 and the second pole pad 221 are arranged in the thickness direction of the board body 21, the projection of the second pole pad 221 in the thickness direction of the board body 21 at least partially overlaps the projection of the connecting portion 71 in the thickness direction, the third wire 5 extends in the thickness direction of the board body 21 and connects the second pole pad 221 and the connecting portion 71, the third wire 5 is connected to the second pole pad 221 and the second pole connector 7 in a short path, the resistance of the third wire 5 is small, the amount of heat generated during overcurrent (particularly, large current) is small, and the battery overcurrent capacity is advantageously improved.
In the above embodiment, the connection portion 71 may be connected to the first surface 22 of the plate body 21. In order to facilitate the arrangement of the connection portion 71 and the second pole lug 12, optionally, the connection portion 71 may be located between the first surface 22 and the second surface 23, that is, the connection portion 71 is located inside the board body 21, the second pole lug 12 is electrically connected to the second pole pad 221, the second pole pad 221 is electrically connected to the connection portion 71 of the second pole connector 7 through the third line 5, since the connection portion 71 is located between the first surface 22 and the second surface 23, the second pole lug 12 is connected to the first surface 22, and the connection portion 71 and the second pole lug 12 are spatially arranged in a staggered manner, a short circuit between the connection portion 71 and the second pole lug 12 may be avoided, and the insulation difficulty thereof may be reduced.
Optionally, the first pole connecting piece 6 may also include a connecting portion, the connecting portion of the first pole connecting piece 6 may extend into the board body 21 and be located between the first surface 22 and the second surface 23, the first circuit 3 may include a first section, a second section and a third section, which are connected in sequence, the first section extends from the first pole pad 222 to the second surface 23 of the board body 21 along the thickness direction of the board body 21, the second section is used for connecting to the first protection switch module 24, and the third section extends from the second surface 23 to the connecting portion of the first pole connecting piece 6 along the thickness direction of the board body 21. The second line 4 may include a fourth section, a fifth section, and a sixth section that are connected in sequence, the fourth section extends from the first pole pad 222 to the second surface 23 of the board body 21 in the thickness direction of the board body 21, the fifth section is for connecting to the second protection switch module 25, and the sixth section extends from the second surface 23 to the connection portion of the first pole connection member 6 in the thickness direction of the board body 21.
As an exemplary embodiment, the second pole connector 7 may include a second pole connector for connection with a second pole terminal on the electronic device, and a first flexible wiring board having one end connected to the second pole connector and the other end connected to the inside of the board body 21 as the connection portion 71 of the second pole connector 7. The first pole connector 6 may include a first pole connector for connection with a first pole terminal inside the electronic device and a second flexible wiring board having one end connected to the first pole connector and the other end connected to the inside of the board body 21 to constitute a connection portion of the first pole connector 6.
As shown in fig. 2, optionally, the first protection switch module 24 and the second protection switch module 25 each include a primary protection switch 26 and a secondary protection switch 27 that are disposed at intervals along the length direction of the plate body 21, the primary protection switch 26 of the first protection switch module 24 is disposed near the first tab 11 and the first pole connecting piece 6 with respect to the secondary protection switch 27 of the first protection switch module 24, the primary protection switch 26 of the second protection switch module 25 is disposed near the first tab 11 and the first pole connecting piece 6 with respect to the secondary protection switch 27 of the second protection switch module 25, the primary protection switch 26 and the secondary protection switch 27 of the first protection switch module 24 are connected in series on the first line 3, and the primary protection switch 26 and the secondary protection switch 27 of the second protection switch module 25 are connected in series on the second line 4.
In the above embodiment, the first line 3 can sequentially flow through the primary protection switch 26 and the secondary protection switch 27 of the first protection switch module 24 along the length direction of the board body 21, the second line 4 can sequentially flow through the primary protection switch 26 and the secondary protection switch 27 of the second protection switch module 25 along the length direction of the board body 21, the first line 3 and the second line 4 are simple in arrangement and do not have the problems of rewinding or bending, the overall length of the first line 3 and the second line 4 can be reduced, and the resistance of the first line 3 and the resistance of the second line 4 are reduced.
Optionally, the protection circuit board 2 may further include a first protection control module 28 and a second protection control module 29, the first protection control module 28 and the second protection control module 29 are disposed on the second surface 23, along the length direction of the board body 21, the first protection switch module 24 and the second protection switch module 25 are located between the first protection control module 28 and the second protection control module 29, and both the first protection control module 28 and the second protection control module 29 are electrically connected to the first protection switch module 24 and the second protection switch module 25. The distance between the first protection control module 28 and the second protection control module 29 is large, and the first protection control module and the second protection control module do not affect each other, so that the heat dissipation requirements among different modules are met, and the stability and the safety of the battery can be guaranteed.
Alternatively, the first protection control module 28 may be a software control module, and may be installed on the second surface 23 at a position close to the second pole ear 12 and the second pole connecting member 7.
The protection circuit board 2 can be mounted on the end surface of the battery cell 1 through the insulating mounting bracket 9, the insulating mounting bracket 9 can prevent a short circuit from occurring between the protection circuit board 2 and the battery cell 1, and the first surface 22 of the protection circuit board 2 can be bonded to the insulating mounting bracket 9. The present disclosure is not particularly limited thereto.
To facilitate heat dissipation of the first protection switch module 24 and the second protection switch module 25, optionally, the battery may further include an insulating and heat-conducting layer 8, and the insulating and heat-conducting layer 8 covers the second surface 23, the first protection switch module 24, and the second protection switch module 25. The insulating heat-conducting layer 8 can avoid the problems of short circuit and the like caused by the contact of the protection circuit board 2 and other structures, and meanwhile, the insulating heat-conducting layer 8 can lead out heat generated by the first protection switch module 24 and the second protection switch module 25 to the outside, so that the heat dissipation of the first protection switch module 24 and the second protection switch module 25 is facilitated, the over-high temperature inside the battery is avoided, and the service life of the battery is prolonged.
The first tab 11 and the second tab 12 are each attached to a plate body 21 of the protection circuit board 2, optionally, as shown in fig. 3 and 6, a first pole pad 222 electrically connected to the first pole tab 11 and a second pole pad 221 electrically connected to the second pole tab 12 may be disposed on the board body 21, each of the first pole pad 222 and the second pole pad 221 is formed in a U-shaped structure and includes a first side plate 223 and a second side plate 224 which are oppositely disposed, the first side plate 223 is connected to the board body 21, the first pole tab 11 is at least partially sandwiched between the first side plate 223 of the first pole pad 222 and the second side plate 224 of the first pole pad 222, the second pole tab 12 is at least partially sandwiched between the first side plate 223 of the second pole pad 221 and the second side plate 224 of the second pole pad 221, the first pole pad 222 and the first pole connector 6 are electrically connected through a first line 3 and a second line 4 which are connected in parallel, and the second pole pad 221 and the second pole connector 7 are electrically connected through a third line 5. The first tab 11 can at least partially contact with the first side plate 223 of the first electrode pad 222 and the second side plate 224 of the first electrode pad 222 in a surface-to-surface manner, the flow area between the first tab 11 and the first electrode pad 222 for current to flow is large, similarly, the flow area between the second tab 12 and the second electrode pad 221 for current to flow is large, the resistance of the contact position is small, and the heat generated when the current passes through is small, so that large current is allowed to flow, and the battery has good performance.
The volume of the battery is affected by various factors such as the capacity of the battery, the maximum rated current, the size of the protection circuit board 2, the installation space of the battery, and the like, and the larger the capacity of the battery or the maximum rated current of the battery is, the larger the size of the battery core 1 or the protection circuit board 2 inside the battery is, and when the battery is installed in electronic equipment such as a mobile phone or a tablet computer, the volume of the battery also needs to be adjusted according to the installation space inside the electronic equipment. The size of the protection circuit board 2 inside the battery is also influenced by various factors such as the maximum rated current of the battery, the complexity of the circuit, the requirement of the circuit insulation and the like. In the battery of the present disclosure, by reducing the complexity of the lines on the protection circuit board 2 and the insulation requirement between the lines, the size of the protection circuit board 2 can be reduced while the same maximum current flow can be ensured, and as an exemplary embodiment, the width of the protection circuit board 2 of the battery of the present disclosure may range from 3mm to 25 mm.
The present disclosure also provides an electronic device, which includes the above battery, wherein the first pole connecting piece 6 of the battery is connected to the first pole connecting end of the electronic device, and the second pole connecting piece 7 of the battery is connected to the second pole connecting end of the electronic device. The electronic device may be a mobile device such as a mobile phone, a tablet computer, or a smart wearable device, and the specific type and function of the electronic device are not limited in the present disclosure. The first electrode connecting member 6 of the battery may be an anode connecting member, the first electrode connecting end of the electronic device may be an anode connecting end, the second electrode connecting member 7 may be a cathode connecting member, and the second electrode connecting end of the electronic device may be a cathode connecting end. Alternatively, the first electrode connector 6 of the battery may be a negative electrode connector, the first electrode connection terminal of the electronic device may be a negative electrode connection terminal, the second electrode connector 7 may be a positive electrode connector, and the second electrode connection terminal of the electronic device may be a positive electrode connection terminal.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (11)

1. A battery, comprising:
the battery cell is provided with a first lug and a second lug;
the protection circuit board comprises a board body, and a first protection switch module and a second protection switch module which are arranged on the board body, wherein a first circuit, a second circuit and a third circuit are integrated on the board body, the first protection switch module is arranged on the first circuit, and the second protection switch module is arranged on the second circuit;
the first pole connecting piece and the first pole lug are connected to the plate body and are electrically connected through the first line and the second line which are mutually connected in parallel;
the second pole connecting piece and the second pole lug are both connected to the plate body, and the second pole connecting piece and the second pole lug are electrically connected through the third circuit;
the first tab is a positive tab, the second tab is a negative tab, the first pole connecting piece is a positive pole connecting piece, and the second pole connecting piece is a negative pole connecting piece; or, the first tab is a negative tab, the second tab is a positive tab, the first pole connecting piece is a negative pole connecting piece, and the second pole connecting piece is a positive pole connecting piece.
2. The battery of claim 1, wherein the first line and the second line are non-intersecting with the third line.
3. The battery of claim 1 or 2, wherein the first and second tabs are spaced apart along a length of the plate body, the first and second pole connectors are spaced apart along the length of the plate body, the first and second tabs are located on both sides of the plate body in a width direction and collinear in the width direction of the plate body, and the second and second pole connectors are located on both sides of the plate body in the width direction and collinear in the width direction of the plate body;
the plate body has first surface and second surface along its thickness direction, first utmost point ear with the second utmost point ear all is connected to the first surface, first protection switch module with the setting of second protection switch module is in on the second surface, first protection switch module with the second protection switch module is followed the length direction of plate body is located first utmost point ear reaches the both sides of first utmost point connecting piece.
4. The battery of claim 3, wherein the first protection switch module and the second protection switch module each comprise a primary protection switch and a secondary protection switch spaced apart along a length direction of the plate body, the primary protection switch of the first protection switch module is disposed adjacent to the first tab and the first pole connector relative to the secondary protection switch of the first protection switch module, and the primary protection switch of the second protection switch module is disposed adjacent to the first tab and the first pole connector relative to the secondary protection switch of the second protection switch module;
the first-stage protection switch and the second-stage protection switch of the first protection switch module are connected in series on the first line, and the first-stage protection switch and the second-stage protection switch of the second protection switch module are connected in series on the second line.
5. The battery according to claim 3, wherein a second pole pad is provided on the first surface, the second tab is electrically connected to the second pole pad, the second pole connector has a connection portion connected to the board body, the connection portion and the second pole pad are arranged in a thickness direction of the board body, a projection of the second pole pad in the thickness direction of the board body at least partially overlaps a projection of the connection portion in the thickness direction, and the third line extends in the thickness direction of the board body and connects the second pole pad and the connection portion.
6. The battery of claim 5, wherein the connection is between the first surface and the second surface.
7. The battery of claim 3, wherein the protection circuit board further comprises a first protection control module and a second protection control module, the first protection control module and the second protection control module are disposed on the second surface, the first protection switch module and the second protection switch module are located between the first protection control module and the second protection control module along a length direction of the board body, and the first protection control module and the second protection control module are electrically connected with the first protection switch module and the second protection switch module.
8. The battery of claim 3, further comprising an insulating and thermally conductive layer overlying the second surface, the first protection switch module, and the second protection switch module.
9. The battery according to claim 1 or 2, wherein a first pole pad electrically connected to the first tab and a second pole pad electrically connected to the second tab are provided on the plate body, the first and second pole pads are each formed in a U-shaped configuration and each include first and second oppositely disposed side plates, the first side plate is connected to the plate body, the first tab is at least partially sandwiched between the first side plate of the first pole pad and the second side plate of the first pole pad, the second pole lug is at least partially sandwiched between the first side plate of the second pole pad and the second side plate of the second pole pad, the first pole pad and the first pole connecting member are electrically connected by the first line and the second line connected in parallel to each other, the second pole pad is electrically connected with the second pole connecting piece through the third circuit.
10. The battery according to claim 1 or 2, wherein the width of the protection circuit board ranges from 3mm to 25 mm.
11. An electronic device comprising a battery as claimed in any one of claims 1 to 10, a first pole connection of the battery being connected to a first pole connection of the electronic device and a second pole connection of the battery being connected to a second pole connection of the electronic device.
CN202221102492.1U 2022-05-09 2022-05-09 Battery and electronic equipment Active CN217387455U (en)

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CN202221102492.1U CN217387455U (en) 2022-05-09 2022-05-09 Battery and electronic equipment
PCT/CN2023/086305 WO2023216774A1 (en) 2022-05-09 2023-04-04 Battery and electronic device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023216774A1 (en) * 2022-05-09 2023-11-16 比亚迪股份有限公司 Battery and electronic device

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Publication number Priority date Publication date Assignee Title
CN201946698U (en) * 2010-12-10 2011-08-24 比亚迪股份有限公司 Lithium ion battery
KR102362074B1 (en) * 2017-03-10 2022-02-11 삼성전자주식회사 Battery including heat radiation plate and electronic device having the same
CN207530023U (en) * 2017-11-03 2018-06-22 维沃移动通信有限公司 A kind of battery and mobile terminal
CN216213669U (en) * 2021-11-10 2022-04-05 北京小米移动软件有限公司 Battery protection board, packaging structure, battery and electronic equipment
CN217387455U (en) * 2022-05-09 2022-09-06 比亚迪股份有限公司 Battery and electronic equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023216774A1 (en) * 2022-05-09 2023-11-16 比亚迪股份有限公司 Battery and electronic device

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