CN114447454A - Battery protection plate and battery - Google Patents
Battery protection plate and battery Download PDFInfo
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- CN114447454A CN114447454A CN202210094358.XA CN202210094358A CN114447454A CN 114447454 A CN114447454 A CN 114447454A CN 202210094358 A CN202210094358 A CN 202210094358A CN 114447454 A CN114447454 A CN 114447454A
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- Prior art keywords
- circuit board
- board main
- main body
- battery
- battery protection
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/144—Stacked arrangements of planar printed circuit boards
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
Abstract
The application discloses battery protection shield and battery. The battery protection board comprises electronic components, a protection body, a first circuit board main body and at least one second circuit board main body, wherein the first circuit board main body and the adjacent second circuit board main body are arranged in a stacked mode; the protective body is at least arranged between the first circuit board main body and the adjacent second circuit board main body and covers the electronic component between the first circuit board main body and the adjacent second circuit board main body. This application is favorable to reducing the width of battery protection shield, saves the shared packaging space of battery to and promote battery energy density.
Description
Technical Field
The application relates to the field of batteries, in particular to a battery protection plate and a battery.
Background
In order to meet the trend of light and thin electronic devices, it has become a mainstream trend in the industry to control the volume and increase the capacity of the battery. In order to reduce the size of the battery as much as possible, manufacturers currently strive to optimize the head space of the battery. In the head space of the battery, the space occupied by the battery protection plate is large. Along with battery protection circuit is more and more complicated, the quantity of the electronic components of wanting the overall arrangement is more and more, and the area that needs set up electronic components is big more, can lead to the width increase of battery protection shield, for example when the width of battery protection shield is greater than the thickness of electric core, the battery protection shield can surpass electric core, leads to the whole thickness of battery great, and this can increase the shared packaging space of battery undoubtedly, also does not benefit to the promotion of battery energy density.
Disclosure of Invention
The embodiment of the application provides a battery protection board and battery, is favorable to reducing the width of battery protection board, saves the shared packaging space of battery to and promote battery energy density.
In a first aspect, an embodiment of the present application provides a battery protection board, including an electronic component, a protection body, and a first circuit board main body and at least one second circuit board main body that are stacked, where the first circuit board main body is disposed opposite to an adjacent second circuit board main body; the first circuit board main body and the second circuit board main body respectively comprise two surfaces which are arranged back to back, and the electronic components of the battery protection board are arranged on at least three surfaces of the battery protection board, wherein the at least three surfaces are the surfaces of the first circuit board main body and the second circuit board main body; the protective body is at least arranged between the first circuit board main body and the adjacent second circuit board main body and covers the electronic component between the first circuit board main body and the adjacent second circuit board main body.
Optionally, the second circuit board main body is disposed on a first surface of the first circuit board main body, the electronic component is disposed on two surfaces of any one of the second circuit board main bodies and a second surface of the first circuit board main body, and the first surface and the second surface are two surfaces of the first circuit board main body that are disposed opposite to each other.
Through setting up electronic components on three at least faces of battery protection shield, realize multiaspect cloth spare, increased electronic components's face on the whole to can control the width of each circuit board main part, for example make it not exceed the thickness of electric core, perhaps reduce length in length direction, thereby save the shared packaging space of battery, the packaging space of saving can be used to promote battery energy density.
In addition, the protective body is arranged between the first circuit board main body and the adjacent second circuit board main body to cover and protect the electronic components, so that the electronic components on one circuit board main body can be insulated from the other circuit board main body, and the electric leakage risk is favorably reduced.
Optionally, adjacent circuit board bodies are electrically connected through a conductive member. For example, the first circuit board main body and the adjacent second circuit board main body are electrically connected through the conductive member; and/or at least one surface of the first circuit board main body is provided with at least two second circuit board main bodies which are stacked, and the adjacent second circuit board main bodies are electrically connected through a conductive piece. The conductive member may be a nickel block. The conductive parts can realize the electric connection between the adjacent circuit board main bodies, and can also enable the adjacent circuit board main bodies to be oppositely arranged, thereby reserving layout space for electronic components.
Optionally, the first surface of the first circuit board main body is further provided with an electronic component.
Optionally, the second surface is provided with two tab connectors, the tab connectors are used for being electrically connected with tabs of the battery core, the battery protection board comprises a plurality of second circuit board main bodies, the second surface of the first circuit board main body is also provided with a second circuit board main body, and the second circuit board main body arranged on the second surface is located between the two tab connectors. Not only can make the region that is located between two utmost point ear connecting pieces of first circuit board main part utilize, realize utilizing as far as possible of face, not locate the second circuit board main part moreover with the folding reduction of the whole thickness of battery protection shield on utmost point ear connecting piece.
Optionally, at least one surface of the first circuit board main body is provided with at least two stacked second circuit board main bodies, wherein part or all of the surface of any one of the second circuit board main bodies is provided with electronic components, and/or two surfaces of any one of the second circuit board main bodies, which are arranged back to back, are provided with electronic components. The stacking arrangement of the second circuit board main bodies can provide more surfaces, and is beneficial to the arrangement of more electronic components.
Optionally, at least one of the two adjacent second circuit board main bodies is provided with a conductive member, and the conductive member electrically connects the two adjacent second circuit board main bodies and is electrically connected to the first circuit board main body through the conductive member closest to the first circuit board main body. Or each second circuit board main body is provided with a conductive piece respectively, and the conductive pieces are used for electrically connecting the corresponding second circuit board main body with the first circuit board main body.
Alternatively, the orthographic projection of the second circuit board body falls within the orthographic projection of the first circuit board body in a direction perpendicular to the battery protection board. For example, the width of the first circuit board main body is larger than that of the second circuit board main body, and the thickness of the battery can be controlled by only controlling the width of the first circuit board main body.
Optionally, the first circuit board main body is a flexible circuit board, and the second circuit board main body is a rigid circuit board.
Optionally, the protective body further covers at least one of: the electronic component circuit board comprises a face provided with an electronic component, a gap between a first circuit board main body and a second circuit board main body, and a gap between the electronic component and the face provided with the electronic component.
Optionally, the protective body is an injection molded body formed by a low pressure injection molding process or a potting process.
Optionally, the height of the protective body protruding from the electronic component is H1And 0.03mm < H1≤0.3mm。
In a second aspect, an embodiment of the present application provides a battery, which includes a battery core and any one of the battery protection boards described above, where the battery protection board is electrically connected to the battery core. The battery has the beneficial effects generated by the corresponding battery protection plate.
Optionally, the width direction of the battery protection board is parallel to or perpendicular to the length direction of the battery core. For example, in a scenario where the top sealing portion extends along the length direction of the battery cell, the battery protection board may be parallel to the top wall of the main body portion and perpendicular to the length direction of the battery cell; or the top wall of the main body part is perpendicular to the length direction of the battery cell. For another example, in a scenario where the seal-top portion is bent toward the top wall, the battery protection board may be parallel to the top wall of the main body portion, and optionally, the seal-top portion is located between the top wall and the battery protection board.
Drawings
Fig. 1 and 2 are schematic structural views of a battery protection plate according to a first embodiment of the present application;
fig. 3 is an exploded view of the structure of the battery protection plate shown in fig. 1;
FIG. 4 is a schematic cross-sectional view of the battery protection sheet shown in FIG. 1 taken along the direction A-A';
fig. 5 is a schematic layout view of conductive elements and protective elements according to an embodiment of the present application;
fig. 6 is a schematic layout view of a conductive device and a protection body according to another embodiment of the present application;
fig. 7 is a schematic structural view of a battery protection plate according to a second embodiment of the present application;
fig. 8 is an exploded view of the structure of the battery protection plate shown in fig. 7;
FIG. 9 is a schematic sectional view of the battery protection sheet shown in FIG. 7 taken along the direction A-A';
fig. 10 is a schematic structural view of a battery protection sheet according to a third embodiment of the present application;
fig. 11 is an exploded view of the structure of the battery protection plate shown in fig. 10;
FIG. 12 is a schematic sectional view of the battery protection sheet shown in FIG. 10 taken along the A-A' direction;
fig. 13 to 16 are schematic structural diagrams of four batteries provided in the embodiment of the present application.
Detailed Description
In this application embodiment, the battery protection board is including the first circuit board main part and an at least second circuit board main part of range upon range of setting, because each circuit board main part all includes two faces of back to setting up, consequently first circuit board main part and an at least second circuit board main part can provide three at least faces for electronic components, realize multiaspect cloth spare, electronic components's face has been increased on the whole, with the width of this each circuit board main part of control, save the shared packaging space of battery, the packaging space who saves can be used to promote battery energy density. The manner in which the electronic component is disposed on the circuit board main body includes, but is not limited to, a mounting manner, and a surface on which the electronic component is disposed may also be referred to as a mounting surface, for example, a mounting manner in which the electronic component is mounted on the circuit board main body and electrically connected by, for example, soldering.
In addition, a protective body is arranged between the first circuit board main body and the adjacent second circuit board main body to cover and protect the electronic components, so that the electronic components on one circuit board main body can be insulated from the other circuit board main body, and the electric leakage risk is favorably reduced.
The function of the battery protection board, the function of the electronic components and the specific type should be set according to the actual required adaptability. For example, the Battery protection board may be integrated with a BMS (Battery management system) for implementing overcurrent protection, overvoltage protection, charge protection, power detection, output short circuit protection, temperature detection, and the like of the Battery, thereby ensuring safety. The battery protection Board may be embodied in the form of a Printed Circuit Board (PCB) or a Flexible Printed Circuit Board (FPC) or a combination of both. For example, the electronic component may be a thermistor, a capacitor, a transistor, a chip, or the like.
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described below in detail with reference to specific embodiments and accompanying drawings. It should be apparent that the embodiments described below are only some embodiments of the present application, and not all embodiments. In the following embodiments and technical features thereof, all of which are described below may be combined with each other without conflict, and also belong to the technical solutions of the present application.
It should be understood that in the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions and simplifying the description of the respective embodiments of the present application, and do not indicate or imply that a device or an element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
Example 1
Referring to fig. 1 to 3, the battery protection plate 1 includes a first circuit board main body 11, a second circuit board main body 12, a plurality of electronic components 21, and a protection body 30.
The first circuit board main body 11 and the second circuit board main body 12 are stacked, and the first circuit board main body 11 and the second circuit board main body 12 are each a plate body and respectively include two surfaces which are arranged oppositely, so called surfaces are also called large surfaces, and can be understood as surfaces provided with at least one of the electronic components 21, the conductive members 22, the tab connectors 23, and the like for mounting (for example, mounting). For example, the first circuit board body 11 includes a first surface 111 and a second surface 112 facing away from each other, and the second circuit board body 12 is disposed on the first surface 111.
The first circuit board main body 11 and the second circuit board main body 12 are disposed opposite to each other, and the opposing arrangement can be regarded as a distance different from zero between the two in the stacking direction, so as to provide a space for the electronic components 21 to be disposed between the first circuit board main body 11 and the second circuit board main body 12. For example, referring to fig. 4, the first circuit board body 11 and the second circuit board body 12 are electrically connected through a conductive member 22, and the conductive member 22 may be a nickel block. The conductive members 22 can both realize the electrical connection between the adjacent circuit board bodies and make the adjacent circuit board bodies oppositely arranged, thereby leaving a layout space for the electronic components 21.
The electronic components 21 are provided on three surfaces of the battery protection board 1, namely, the second surface 112 of the first circuit board body 11 and two surfaces of the second circuit board body 12.
Through setting up electronic components 21 on three faces of battery protection shield 1, realize the multiaspect cloth spare, increased the face that can be used to set up electronic components 21 of battery protection shield 1 on the whole to can reduce the width of each circuit board main part, save the shared packaging space of battery that has this battery protection shield 1, the packaging space of saving can be used to promote battery energy density.
In some scenarios, the electronic components 21 may also be disposed on the first side 111 of the first circuit board body 11. For example, two tab connectors 23 electrically connected to the battery cell are disposed on the first surface 111 of the first circuit board main body 11, and since the two tab connectors 23 are disposed opposite to each other, the electronic component 21 may be disposed in an area of the first surface 111 between the two tab connectors 23. Of course, the electronic component 21 may be provided at another position of the first surface 111.
The orthogonal projection of the second circuit board body 12 may fall within the orthogonal projection of the first circuit board body 11 in a direction perpendicular to the battery protection board 1, i.e., the second direction y shown in the drawing. For example, in a scene where the width direction of the battery protection board 1 is perpendicular to the length direction of the battery cell, the width of the first circuit board main body 11 is greater than or equal to the width of the second circuit board main body 12, and the thickness of the whole battery can be controlled by controlling the width of the first circuit board main body 11 not to exceed the thickness of the battery cell.
In the embodiment of the present application, the second direction y is a thickness direction of the battery protection board 1 and each circuit board main body, a length direction of the battery protection board 1 and each circuit board main body is a first direction x, a width direction thereof may be a third direction z, and the first direction x, the second direction y and the third direction z are perpendicular to each other. It should be noted that, limited by the actual processing or measurement error (also called tolerance), the term perpendicular as used throughout this application does not require that the angle between the two must be 90 °, but allows a deviation of ± 10 °, i.e. perpendicular is understood to mean that the angle between any two directions is 80 ° to 100 °.
It should be understood that the types of the first circuit board body 11 and the second circuit board body 12 are not limited in the embodiments of the present application. In some scenarios, the first Circuit Board body 11 and the second Circuit Board body 12 may both be rigid Circuit boards, such as Printed Circuit Boards (PCBs); alternatively, the first Circuit board main body 11 and the second Circuit board main body 12 may be both Flexible Printed Circuit (FPC); or, at least one of the first circuit board main body 11 and the second circuit board main body 12 is a flexible printed circuit board and a rigid printed circuit board, where the flexible printed circuit board and the rigid printed circuit board are combined; alternatively, one of the first circuit board body 11 and the second circuit board body 12 is a flexible circuit board, and the other is a rigid circuit board, for example, the first circuit board body 11 is a flexible circuit board, and the second circuit board body 12 is a rigid circuit board. Along the stacking direction of the first circuit board main body 11 and the second circuit board main body 12, for example, the second direction y shown in the figure, the orthographic projection of the second circuit board main body 12 may fall into the orthographic projection of the first circuit board main body 11, and a portion of the first circuit board main body 11 beyond the second circuit board main body 12 may be folded and be electrically connected with other devices through the external terminal 113 after being folded.
The protective body 30 is disposed at least between the first circuit board main body 11 and the adjacent second circuit board main body 12, and covers the electronic component 21 located therebetween. As shown in fig. 1 to 4, the protective body 30 is further disposed on a side of the second circuit board main body 12 facing away from the first circuit board main body 11, and covers the electronic component 21 on the side, that is, the protective body 30 is disposed on both sides of the second circuit board main body 12. The protective body 30 covers and protects the electronic component 21, so that the electronic component 21 on one circuit board main body can be insulated from the other circuit board main body, and the risk of electric leakage is reduced.
The protective body 30 can also prevent the electronic component 21 from being directly impacted (for example, from a battery compartment, etc.), and even if the head of the battery is impacted by the outside, the protective body 30 can provide a buffer function, for example, the elastic protective body 30 can deform to buffer the impact when being impacted. In addition, the protective body 30 can improve the relative stability between the electronic component 21 and the circuit board main body. In this way, the protector 30 can reduce the risk of damage and detachment of the electronic component 21.
The protective body 30 may also cover at least one of: (1) for example, referring to fig. 1 and 2, the protective body 30 completely covers both surfaces of the second circuit board main body 12 on which the electronic components 21 are disposed, and the coverage area of the protective body 30 is equal to the area of the surface of the second circuit board main body 12; of course, the protective body 30 may cover the second surface 112 of the first circuit board main body 11 on which the electronic component 21 is provided, for example, only a partial region of the second surface 112 on which the electronic component 21 is provided; (2) the space between the first circuit board main body 11 and the second circuit board main body 12 fills up the orthographic projection overlapping part between the two circuit board main bodies, which is not only beneficial to protecting the electronic component 21, but also can prevent impurities such as water vapor and the like from entering between the two circuit board main bodies and is beneficial to improving the connection stability between the circuit board main bodies; (3) the gap between the electronic component 21 and the surface on which the electronic component 21 is provided can stably provide the electronic component 21 on the corresponding surface, thereby reducing the risk of the electronic component 21 falling off.
The protective body 30 may be an injection molded body formed through a low pressure injection molding process or a potting process. For example, after the first circuit board main body 11 is electrically connected to each of the second circuit board main bodies 12, the protective body 30 is formed at the fitting position. For another example, the protective member 30 is formed on the surface of the circuit board main body to be injection-molded, and then the first circuit board main body 11 is electrically connected to each of the second circuit board main bodies 12.
The protective body 30 may also have other functions, such as a heat conduction function, and the protective body 30 may conduct heat generated by the battery protection board 1 to the outside to dissipate the heat.
Optionally, the height (i.e. the length along the second direction y) of the protection body 30 protruding from the electronic component 21 is H1And 0.03mm < H1Less than or equal to 0.3 mm. By setting the thickness of the protective body 30 within the threshold value, the electronic component 21 can be effectively protected from impact and from erroneous contact between the electronic component 21 and an external element, and the length of the battery head can be reduced as much as possibleAnd the design is favorable for increasing the battery capacity.
In the present embodiment, the sizes, shapes, and orientations of the circuit board main body, the conductive member 22, and the tab connecting member 23 can be adaptively set according to actual needs.
For example, the thicknesses of the first and second circuit board bodies 11 and 12 may be both D0And D is not more than 0.4mm0Less than or equal to 1.0mm, so that the circuit board main body is not easy to deform, the risk of falling off of the electronic component 21 can be reduced, and the length of the head of the battery can be reduced.
For another example, the width of the first and second circuit board bodies 11 and 12 may be W0And W is not more than 2mm0Less than or equal to 8 mm; the length of the second circuit board body 12 may be between 20mm and 150 mm.
For another example, the height of the conductive member 22 is greater than the thickness of the protective member 30, and the height difference is between 0mm and 0.2mm, so that the conductive member 22 exposes the corresponding protective member 30 and is electrically connected to the first circuit board main body 11. For example, referring to fig. 5, the conductive devices 22 with smaller size may be arranged in two rows, the two rows of conductive devices 22 are oppositely arranged along the third direction z, the conductive devices 22 of each row are arranged at intervals along the first direction x, and the conductive devices 22 with larger size may be arranged at intervals along the first direction x as shown in fig. 6. Optionally, the distance between the edge of the conductive device 22 and the edge of the second circuit board main body 12 is greater than 0.1mm, so as to reduce the risk of leakage of the conductive device 22 due to exposure.
Example 2
For ease of description, the same reference numbers will be used throughout this application to identify elements of the same name. On the basis of the foregoing description of embodiment 1, but referring to fig. 7 to 9, in embodiment 2, the second surface 112 of the first circuit board main body 11 is also provided with the second circuit board main body 12, and the second circuit board main body 12 is located between the two tab connectors 23.
The length of the second circuit board body 12 disposed at the second face 112 may be smaller than the length of the second circuit board body 12 disposed at the first face 111. The second circuit board main body 12 disposed on the second surface 112 may also be provided with an electronic component 21 and a protective body 30 on two surfaces thereof, the surface of the second circuit board main body 12 facing the first circuit board main body 11 is provided with a conductive member 22, and the conductive member 22 is used for electrically connecting the second circuit board main body 12 and the first circuit board main body 11.
The second surface 112 of the first circuit board main body 11 located between the two tab connectors 23 is utilized, so as to achieve the best utilization of the second surface 112, and the second circuit board main body 112 can be arranged with more second circuit board main bodies 12, so as to provide more surfaces for arranging the electronic components 21, for example, please refer to fig. 8 and 9, at least four surfaces can be used for arranging the electronic components 21, which is more beneficial to reducing the width of any circuit board main body. In addition, in the present embodiment, the second circuit board main body 12 is not stacked on the tab connecting member 23, and the thickness of the battery protection plate 1 is not increased to a large extent.
In some scenarios, the region of the first circuit board body 11 where the second circuit board body 12 is not disposed (i.e., the region not covered by the orthographic projection of the second circuit board body 12) may also be provided with the electronic component 21, so that there may be up to six faces for providing the electronic component 21.
Example 3
On the basis of the description of the foregoing embodiment 1, but with reference to fig. 10 to 12, the first surface 111 of the first circuit board main body 11 is provided with two stacked second circuit board main bodies 12, and all surfaces of the two second circuit board main bodies 12 are provided with the electronic components 21.
For example, referring to fig. 11 and 12, the two surfaces of the middle second circuit board main body 12 are provided with the conductive members 22, and only the surface of the outermost second circuit board main body 12 facing the middle second circuit board main body 12 is provided with the conductive member 22. The conductive member 22 electrically connects adjacent two second circuit board bodies 12 and is electrically connected to the first circuit board body 11 through the conductive member 22 closest to the first circuit board body 11.
In other scenarios, one of the two adjacent second circuit board bodies 12 is provided with a conductive member 22, and the conductive member 22 electrically connects the two adjacent second circuit board bodies 12 and the first circuit board body 11 through the conductive member 22 closest to the first circuit board body. Or, each of the second circuit board main bodies 12 is provided with a conductive member 22, and the conductive member 22 is used to electrically connect the corresponding second circuit board main body 12 with the first circuit board 11, that is, each of the second circuit board main bodies 12 is electrically connected with the first circuit board main body 11 alone, so that even if one or some of the second circuit board main bodies 12 fails, other second circuit board main bodies 12 can be electrically connected with the first circuit board main body 11, and perform the corresponding function normally.
Alternatively, in other scenarios, the second face 112 of the first circuit board body 11 may be provided with two second circuit board bodies 12 stacked; alternatively, the first surface 111 and the second surface 112 are each provided with two or more stacked second circuit board main bodies 12. One surface of one part of the second circuit board main body 12 is provided with the electronic component 21, the other surface opposite to the first circuit board main body is not provided with the electronic component 21, and the two surfaces of the other part of the second circuit board main body 12 are both provided with the electronic components 21.
The stacking arrangement of the second circuit board main bodies 12 can provide more surfaces for arranging the electronic components 21, which is further beneficial to the arrangement of more electronic components 21 and the reduction of the width of any circuit board main body, thereby realizing the reduction of the width of the battery protection board 1.
Referring to fig. 13 to fig. 16, an embodiment of the present application further provides a battery 2, which includes a battery core 20 and the battery protection plate 1 of any of the above embodiments, wherein the battery protection plate 1 is electrically connected to the battery core 20. The battery 2 has advantageous effects that can be produced corresponding to the battery protection plate 1.
As shown in fig. 13, the top seal portion 201 of the battery cell 20 is extended along the length direction of the battery cell 20 (i.e., the second direction y in fig. 13), and the width direction z of the battery protection plate 1 is perpendicular to the length direction y of the battery cell 20 due to the width W of the battery protection plate 10Is reduced so that the width W of the battery protection plate 1 is reduced0Does not exceed the width W of the cell 201So that the width of the battery 2 can be controlled at W1Within. Thickness H of battery protection plate 11Smaller, and does not occupy a greater length in the lengthwise direction y of the battery cell 20. In this scenario, the tab 202 of the battery cell 20 may be bent after protruding from the top sealing portion 201, and bent to be between the top wall of the battery cell 20 and the battery protection plate 1, and electrically connected to the battery protection plate 1 through the adaptor 203.
As shown in fig. 14, the top seal portion 201 of the battery cell 20 is extended along the length direction of the battery cell 20 (i.e. the third direction z in fig. 14), and the width direction z of the battery protection plate 1 is parallel to the length direction z of the battery cell 20 due to the thickness H of the battery protection plate 11Is small, and thus the thickness H of the battery protection plate 11Does not exceed the width W of the battery cell 201So that the width of the battery 2 can be controlled at W1Within. Width W of battery protection plate 10Smaller, and does not occupy a larger length in the lengthwise direction z of the battery cell 20. In this scenario, after the tab 202 of the battery cell 20 extends out of the top sealing portion 201, it may be bent, and bent between the top sealing portion 201 and the battery protection plate 1, and electrically connected to the battery protection plate 1 through the adaptor 203.
As shown in fig. 15, the top seal portion 201 of the battery cell 20 is extended along the width direction of the battery cell 20 (i.e., the third direction z in fig. 15), and the width direction z of the battery protection plate 1 is parallel to the width direction z of the battery cell 20 due to the width W of the battery protection plate 10Is reduced so that the width W of the battery protection plate 1 is reduced0Does not exceed the width W of the cell 201So that the width of the battery 2 can be controlled at W1Within. Thickness H of battery protection plate 11Smaller, and does not occupy a greater length in the lengthwise direction y of the battery cell 20. In this scenario, the tab 202 of the battery cell 20 may be bent after protruding from the top sealing portion 201, and bent to a side of the battery protection plate 1 facing away from the battery cell 20, and electrically connected to the battery protection plate 1 through the adaptor 203. For example, in a steel-shelled battery 2 shown in fig. 16, a tab (also called a positive electrode tab) 202 of the battery cell 20 is electrically connected to the battery protection plate 1 after protruding from the case serving as the negative electrode.
In a specific scenario, the battery 2 of any of the foregoing embodiments includes, but is not limited to, all kinds of primary, secondary, fuel, solar and capacitor (e.g., supercapacitor) batteries, which may be pouch batteries. The battery 2 may preferably be a lithium secondary battery. The battery 2 of the embodiment of the present application may be present in the form of a single battery, a battery cell, or a battery module.
The embodiment of the present application further provides an electronic device, which includes a load and the battery 2 according to any of the above embodiments, and the battery 2 supplies power to the load. Since the electronic device has the battery 2 of any one of the foregoing embodiments, the electronic device can produce the advantageous effects that the battery 2 of the corresponding embodiment has.
Electronic devices may be implemented in various specific forms, such as electronic products like unmanned aerial vehicles, electric cleaning tools, energy storage products, electric vehicles, electric bicycles, electric navigation tools, and so on. In a practical scenario, the electronic device specifically includes but is not limited to: the power supply comprises a standby power supply, a motor, an automobile, a motorcycle, a power-assisted bicycle, a bicycle electric tool, a household large-scale storage battery, a lithium ion capacitor and the like.
It will be understood by those skilled in the art that the configuration according to the embodiments of the present application can be applied to electronic devices of a stationary type, in addition to elements particularly for moving purposes.
It should be understood that the above-mentioned embodiments are only some examples of the present application, and not intended to limit the scope of the present application, and all structural equivalents made by those skilled in the art using the contents of the present specification and the accompanying drawings are also included in the scope of the present application.
Although the terms "first, second, etc. are used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well. The terms "or" and/or "are to be construed as inclusive or meaning any one or any combination. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.
Claims (14)
1. A battery protection board is provided with electronic components and is characterized by comprising a protection body, a first circuit board main body and at least one second circuit board main body, wherein the first circuit board main body and the second circuit board main body are arranged in a stacked mode;
the first circuit board main body and the second circuit board main body respectively comprise two surfaces which are arranged back to back, electronic components of the battery protection board are arranged on at least three surfaces of the battery protection board, and the at least three surfaces are the surfaces of the first circuit board main body and the second circuit board main body;
the protective body is at least arranged between the first circuit board main body and the adjacent second circuit board main body and covers the electronic component between the first circuit board main body and the adjacent second circuit board main body.
2. The battery protection plate as claimed in claim 1, wherein the first circuit board body and the adjacent second circuit board body are electrically connected by a conductive member; and/or the presence of a gas in the gas,
at least one side of the first circuit board main body is provided with at least two second circuit board main bodies which are stacked, and the adjacent second circuit board main bodies are electrically connected through the conductive piece.
3. The battery protection board according to claim 1, wherein the second circuit board main body is disposed on a first surface of the first circuit board main body, and the electronic component is disposed on both surfaces of any one of the second circuit board main body disposed opposite to each other and a second surface of the first circuit board main body, and the first surface and the second surface are both surfaces of the first circuit board main body disposed opposite to each other.
4. The battery protection plate as claimed in claim 3, wherein the first face of the first circuit board main body is further provided with the electronic component.
5. The battery protection plate as claimed in claim 3, wherein the second face is provided with two tab connectors for electrical connection with tabs of the cells,
the battery protection board comprises a plurality of second circuit board main bodies, wherein the second surface of the first circuit board main body is also provided with the second circuit board main bodies, and the second circuit board main bodies arranged on the second surface are positioned between the two lug connecting pieces.
6. The battery protection plate as claimed in claim 2, wherein at least one side of the first circuit board main body is provided with at least two second circuit board main bodies which are stacked;
the electronic components are arranged on one surface of any one of the second circuit board main bodies, and/or the electronic components are arranged on two oppositely-arranged surfaces of any one of the second circuit board main bodies.
7. The battery protection plate according to claim 6,
at least one of the two adjacent second circuit board main bodies is provided with the conductive piece, and the conductive piece is used for electrically connecting the two adjacent second circuit board main bodies and is electrically connected with the first circuit board main body through the conductive piece closest to the first circuit board main body; alternatively, the first and second electrodes may be,
each second circuit board main body is provided with a conductive piece, and the conductive pieces are used for electrically connecting the corresponding second circuit board main body with the first circuit board main body.
8. The battery protection plate as claimed in claim 1, wherein an orthogonal projection of the second circuit board main body falls within an orthogonal projection of the first circuit board main body in a direction perpendicular to the battery protection plate.
9. The battery protection plate as claimed in claim 1, wherein the first circuit board body is a flexible circuit board, and the second circuit board body is a rigid circuit board.
10. The battery protection plate as claimed in any one of claims 1 to 9, wherein the protection body further covers at least one of:
the electronic component is arranged on the surface of the electronic component, the gap between the first circuit board main body and the second circuit board main body, and the gap between the electronic component and the surface of the electronic component.
11. The battery protection plate as claimed in claim 10, wherein the protection body is an injection molded body formed through a low pressure injection molding process or a potting process.
12. The battery protection plate as claimed in claim 10, wherein the height of the protection body protruding from the electronic component is H1And 0.03mm < H1≤0.3mm。
13. A battery comprising a cell and the battery protection sheet of any one of claims 1 to 12, the battery protection sheet being electrically connected to the cell.
14. The battery of claim 13, wherein the width direction of the battery protection plate is parallel or perpendicular to the length direction of the battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094358.XA CN114447454A (en) | 2022-01-26 | 2022-01-26 | Battery protection plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210094358.XA CN114447454A (en) | 2022-01-26 | 2022-01-26 | Battery protection plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114447454A true CN114447454A (en) | 2022-05-06 |
Family
ID=81369544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210094358.XA Pending CN114447454A (en) | 2022-01-26 | 2022-01-26 | Battery protection plate and battery |
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| Country | Link |
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| CN (1) | CN114447454A (en) |
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| WO2023005392A1 (en) * | 2021-07-30 | 2023-02-02 | 东莞新能德科技有限公司 | Battery protection plate and manufacturing method therefor, battery, and electronic device |
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