CN113937425A

CN113937425A - Battery protection board, battery and terminal

Info

Publication number: CN113937425A
Application number: CN202010610406.7A
Authority: CN
Inventors: 高锃; 魏学文; 郑洪彬
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-01-14

Abstract

The present disclosure relates to a battery protection plate, a battery, and a terminal. Wherein the battery protection board includes: for connecting a battery cell with a connector, comprising: the access plate, first reposition of redundant personnel board, first connecting plate and second connecting plate. The first flow distribution plate is used for distributing the current on the access plate of the battery protection plate, so that the overflowing amount is reduced, the size of the battery protection plate can be reduced, and the total volume of the battery is reduced; or can carry higher current under the condition of unchanged size, so that more electric quantity can be provided by adopting a battery cell with larger volume.

Description

Battery protection board, battery and terminal

Technical Field

The present disclosure relates to the field of batteries, and particularly to a battery protection board, a battery and a terminal.

Background

In the process of using the lithium battery, overcharge, overdischarge, short circuit and overcurrent all affect the service life and performance of the battery, and serious conditions can cause combustion and explosion of the lithium battery. Therefore, each lithium battery is provided with a battery protection plate which consists of an IC chip and a plurality of elements, the damage to the battery is effectively monitored and prevented through a protection loop, and dangers such as combustion, explosion and the like caused by overcharge, overdischarge and short circuit are prevented.

The battery protection board plays the effect such as overcurrent, excessive pressure, temperature protection, and the battery core's the two poles of the earth passes through the battery protection board and connects the two poles of the earth of connector, and the two poles of the earth of connector is used for connecting external equipment and realizes charging and discharging. Since the battery protection board needs to pass the current consistent with the battery cell, the larger the current passing through is, the larger the size of the battery protection board is needed, and the larger the space occupied by the battery protection board is. Along with the increase of the space occupied by the battery protection board, the space of the battery cell is correspondingly reduced under the condition that the whole space of the battery assembly is certain, so that the whole battery capacity is smaller.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a battery protection plate, a battery, and a terminal.

According to a first aspect of the embodiments of the present disclosure, there is provided a battery protection plate for connecting a battery cell and a connector, the battery protection plate comprising: the device comprises an access plate, a first splitter plate, a first connecting plate and a second connecting plate; wherein, the access board includes: the first connection-out point is arranged at one end of the connection plate and is connected with a first pole of a connector of the connector through the first connection plate; the second connection point is arranged at the other end of the connection plate opposite to the first connection point and is connected with a second pole of the connector through the second connecting plate; a first access point, disposed between the first and second connection points, for connection to a first cell pole of the battery cell; the second access point is arranged between the first access point and the second access point and is used for being connected with a second pole of the battery cell; the first flow distribution plate includes: the first shunt access end is positioned at one end of the first shunt plate and connected to the first access point of the access plate or connected between the first access point and the second access point of the access plate; and a first shunt outlet end, located at the other end of the first shunt plate opposite to the first shunt inlet end, connected to an electrical path between the second access point of the access plate and the second pole of the connector.

In an embodiment, the first shunting outlet is connected to the second outlet of the access board, or connected between the second access point and the second outlet of the access board.

In one embodiment, the first tapping point is connected to the second connecting plate.

In one embodiment, the first flow dividing plate and the second flow dividing plate are integrally formed.

In an embodiment, the first flow splitter plate further comprises a flow splitter plate connecting the first flow inlet with the first connection plate.

In one embodiment, the first splitter plate and the first connecting plate are integrally formed.

In one embodiment, the first splitter plate, the first connecting plate, and the second connecting plate are integrally formed.

In one embodiment, the first splitter plate, the first connection plate, and the second connection plate are integrally formed as a flexible circuit board.

In one embodiment, the battery protection plate further includes: a second splitter plate; the second shunting plate includes: the second shunt access end is positioned at one end of the second shunt plate and connected to the second access point of the access plate or connected between the first access point and the second access point of the access plate; and the second shunt outlet end is positioned at the other end of the second shunt plate opposite to the first shunt inlet end and is connected to an electric path from the first access point of the access plate to the first pole of the connector.

In an embodiment, the first splitter plate, the first connection plate, and the second connection plate are all connected to the access plate by welding.

In one embodiment, the battery protection plate further includes: a protection circuit disposed in the access board, the protection circuit including: a protection circuit chip, an MOS switch and a thermistor.

In an embodiment, the cell first pole is a positive pole, and the cell second pole is a negative pole.

According to a second aspect of embodiments of the present disclosure, there is provided a battery including: a connector including a connector first pole and a connector second pole for outputting or inputting a current; a battery cell comprising a cell first pole and a cell second pole; the battery protection plate of the first aspect, the battery protection plate communicating the cell first pole with the connector first pole and communicating the cell second pole with the connector second pole.

According to a third aspect of embodiments of the present disclosure, there is provided a terminal comprising a battery as described in the second aspect for providing power.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the first flow distribution plate is used for distributing the current on the access plate of the battery protection plate, so that the overflowing amount is reduced, the size of the battery protection plate can be reduced, and the total volume of the battery is reduced; or can carry higher current under the condition of unchanged size, so that more electric quantity can be provided by adopting a battery cell with larger volume.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic view illustrating a related art battery protection plate according to an exemplary embodiment.

Fig. 2 is a schematic view illustrating another related art battery protection plate according to an exemplary embodiment.

Fig. 3 shows a schematic structural diagram of a battery protection plate according to an embodiment of the present disclosure.

Fig. 4 shows a schematic structural view of a battery protection plate according to another embodiment of the present disclosure.

Fig. 5 shows a schematic structural view of a battery protection plate according to another embodiment of the present disclosure.

Fig. 6 shows a schematic structural view of a battery protection plate according to another embodiment of the present disclosure.

Fig. 7 shows a circuit schematic of a protection circuit of an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

It should be noted that, although the expressions "first", "second", etc. are used herein to describe different modules, steps, data, etc. of the embodiments of the present disclosure, the expressions "first", "second", etc. are merely used to distinguish between different modules, steps, data, etc. and do not indicate a particular order or degree of importance. Indeed, the terms "first," "second," and the like are fully interchangeable.

In some conventional schemes, as shown in fig. 1, two poles of the battery cells 20 are respectively welded to the battery protection plate 10, two ends of the battery protection plate 10 are respectively communicated with two poles of the connector 30, and the battery protection plate 10 is provided with a protection circuit for protecting the battery cells 20 when overcharge, overdischarge, short circuit, overcurrent, or the like occurs. In this structure, the main body of the battery protection plate 10 needs to pass through I/2 positive current and I/2 negative current under the assumption that the total current is I, so that the width of the battery protection plate 10 needs to be large to ensure that the current is carried, a large space is occupied, and the available space of the battery cell 20 is compressed. .

In some related arts, as shown in fig. 2, in order to reduce the current concentration, a U-shaped nickel plate 11 is provided in the battery protection plate 10, the nickel plate 11 is connected to the positive electrode 21 of the battery cell 20 by welding, and is welded to the access plate (hard plate) 12 of the battery protection plate 10 by welding both ends of the U-shaped nickel plate 11 to form a shunt, the negative electrode 22 of the battery cell 20 is directly welded to the access plate 12, and both ends of the access plate 12 are respectively welded to the connection plates 13 to connect both electrodes of the connector 30. By adopting the mode, the nickel sheet 11 is used for welding, the integrity is poor, the structures of the battery cell 20, the nickel sheet 11 and the access plate 12 are complex, and the risk of breakage and short circuit in falling due to the structural relationship of the nickel sheet 11 is relatively high.

In order to solve the technical problem, an embodiment of the present disclosure provides a battery protection board 40, configured to connect a battery cell 50 and a connector, and conduct a cell first pole 51 of the battery cell 50 and a connector first pole 61 of the connector, and conduct a cell second pole 52 and a connector second pole 62 through the battery protection board, and protect the battery cell 50 through a protection circuit disposed on the battery protection board 40.

The cell first pole 51 may be a positive pole or a negative pole, and the corresponding cell second pole 52 is opposite in polarity to the cell first pole 51, and may be a negative pole or a positive pole. The connector first pole 61 has the same polarity as the cell first pole 51, and the connector second pole 62 has the same polarity as the cell second pole 52, corresponding to the positive and negative poles of the cell first pole 51 and the cell second pole 52. Since most protection circuits adopt a negative low-voltage circuit for protection, the battery cell first pole 51 is a positive pole, and the battery cell second pole 52 is a negative pole.

As shown in fig. 3, 4, and 5, the battery protection plate 40 may include: an access plate 41, a first flow dividing plate 42, a first connecting plate 43 and a second connecting plate 44.

The access board 41 is sequentially provided with a first access point 411, a first access point 413, a second access point 414, and a second access point 412 from one end to the other end. The first connection point 411, the first connection point 413, the second connection point 414, and the second connection point 412 may not be separate components, but may be locations connected to other components, or may be welding points connected by welding.

The first connection point 411 is disposed at one end of the connection plate 41, may be close to the end, may be connected to the first connection plate 43 by welding, and is connected to the first connector pole 61 of the connector through the first connection plate 43.

The second connection point 412 is disposed at the other end of the access board 41 opposite to the first connection point 411, may be close to the end, may be connected to the second connection board 44 by welding or the like, and may be connected to the second connector pole 62 of the connector through the second connection board 44.

The first access point 413 is disposed between the first connection point 411 and the second connection point 412, and may be connected to the first electrode 51 of the battery cell 50 by welding or the like, so that the first electrode 51 of the battery cell is communicated with the first electrode 61 of the connector through the first access point 413, the access plate 41 between the first access point 413 and the first connection point 411, and the first connection plate 43 communicating the first connection point 411 and the first electrode 61 of the connector, thereby forming an electrical path from the first electrode 51 of the battery cell to the first electrode 61 of the connector.

The second access point 414 is disposed between the first access point 413 and the second exit point 412, and may be connected to the second cell pole 52 of the battery cell 50 by welding or the like, so that the second cell pole 52 is communicated with the second connector pole 62 through the second access point 414, the access plate 41 between the second access point 414 and the second exit point 413, and the second connection plate 44 communicating the second exit point 413 and the second connector pole 62, thereby forming an electrical path from the second cell pole 52 to the second connector pole 62.

The first diversion plate 42 may be a flexible board or a part of a flexible circuit board, and in some cases may be integrally formed with one or both of the first and

second connection plates

43, 44. The first flow dividing plate 42 includes: a first tapping in 421 and a first tapping out 422. Here, the first shunt input terminal 421 and the first shunt output terminal 422 may not be separate components, but may be only connected to other components, or may be welding points connected by welding.

The first shunting inlet 421 is located at one end of the first shunting plate 42, and may be connected to the first access point 413 of the access plate 41 as shown in fig. 3, or connected between the first access point 413 and the second access point 414 of the access plate 41 as shown in fig. 4.

The first tapping point 422 is located at the other end of the first flow splitting plate 42 opposite to the first tapping point 421, and is connected to the electrical path from the second tapping point 414 of the tapping plate 41 to the second pole 62 of the connector.

In the above embodiment, the first current splitting plate 42 is added, so that the positive electrode performs current splitting with the total current of I/2 on both sides of the circuit. Meanwhile, the negative electrode is shunted left and right respectively, and the current on the two sides is I/2. That is, for the main body portion of the access board 41, the current is from the positive current of I/2 and the negative current of I/2 of the above conventional scheme. When the negative current of I/2 is changed, the total passing current is reduced by half, and the total width of the corresponding access plate 41 and the battery protection plate 10 is also greatly reduced. In the superimposed first current splitter plate 42 through which the current passes, the current may be folded back to the surface of the battery cell 50, and folded back above or below the battery cell 50, so that the extra length of the battery is not occupied, the space of the battery cell 50 is increased, and the capacity of the battery is increased. The first splitter plate 42, the first connection plate 43, and the second connection plate 44 may be rigid-flexible plates or welded plates.

In one embodiment, as shown in fig. 3, the first tapping point 422 may be connected between the second access point 414 and the second tapping point 412 of the access panel 41. This kind of mode can shunt the electric current on access panel 41 to a certain extent, reduces the electric current total amount on access panel 41 to reduce the size of access panel 41, not too much increase the size of first shunting board 42 simultaneously.

In another embodiment, the first tapping outlet 422 may be connected to the second outlet point 412 of the access panel 41. Compared with the former method, the first shunt outlet 422 is closer to the end of the access plate 41, thereby further reducing the total amount of current on the access plate 41.

In one embodiment, the first tapping point 422 is connected to the second connecting plate 44. Compared with the scheme of the previous embodiment, the connection mode directly connects the first current dividing plate 42 with the second connection plate 44, and the current on the access plate 41 can be further reduced under the condition that the size of a certain first current dividing plate 42 is increased, so that the size of the access plate 41 can be further reduced, or a larger current can be carried under the condition that the size is not changed. In this embodiment, the first splitter plate 42 and the second connecting plate 44 may be welded or integrally formed.

In one embodiment, as shown in fig. 5, the first flow dividing plate 42 further includes a flow dividing plate 423, and the flow dividing plate 423 connects the first flow dividing inlet 421 with the first connecting plate 43. In this embodiment, the circuit of the access board 41 communicating with the electrical path of the first pole 61 of the connector is further shunted, so that the current load of the access board 41 is further reduced.

In one embodiment, the first flow inlet and outlet 422 of the first flow plate 42 may be directly connected to the second connecting plate 44, that is, the first flow inlet and outlet 421 of the first flow plate 42 is connected to the inlet plate 41, the first flow plate 42 forms two branches, one branch is an electric path formed by connecting the first flow inlet and outlet 422 to the second connecting plate 44 from the first flow inlet and outlet 421 to the first flow outlet and 422 to communicate with the second pole 62 of the connector through the second connecting plate 44, and the other branch is an electric path formed by connecting the first connecting plate 43 through the branch plate 423 from the first flow inlet and outlet 421 to the first connecting plate 43 through the branch 423 to communicate with the first pole 61 of the connector through the first connecting plate 43. In this embodiment, the overcurrent of all the circuits is reduced from I to I/2, not only the space of the portion of the access board 41 is reduced, but also the circuit formed by the first current dividing plate 42, the first connecting plate 43 and the second connecting plate 44 has uniform I/2 in the overcurrent portions connected to each other in the electrical path, thereby reducing the circuit load. In this embodiment, the branch plate 423 of the first branch flow plate 42 and the first connection plate 43 may be connected by welding or may be integrally formed.

In the above embodiment, the first splitter plate 42, the first connecting plate 43, and the second connecting plate 44 may be connected to each other by welding or may be integrally formed. In an embodiment, the first shunting plate 42, the first connecting plate 43, and the second connecting plate 44 may be integrally formed by a Flexible Printed Circuit (FPC). Thereby can be for accessing board 41 reposition of redundant personnel, reduce the space that occupies, also can make things convenient for shaping and installation simultaneously.

In one embodiment, as shown in fig. 6, the battery protection plate 40 may further include: the second current dividing plate 45 divides the current flowing to the access plate 41 by the second current dividing plate 45 independently of the first current dividing plate 42. The second flow dividing plate 45 includes: a second shunting inlet 451, located at one end of the second shunting plate 45, connected to the second inlet 414 of the access panel 41, or connected between the first inlet 413 and the second inlet 414 of the access panel 41; the second shunting outlet 452 is located at the other end of the second shunting plate 45 opposite to the first shunting inlet 451, and is connected to the electrical path from the first inlet 413 of the access plate 41 to the first pole 61 of the connector. In this embodiment, the second shunting plate 45 and the first shunting plate 42 may be correspondingly disposed, and the second shunting outlet 452 may be connected to the access plate 41 between the first access point 413 and the first outlet point 411, or directly connected to the first connecting plate 43 by welding or integrally forming. Another branch path independent from the first branch plate 42 is formed by the second branch plate 45, so that the current load on the access plate 41 is reduced, and the occupied space is reduced.

In the embodiment of the present disclosure, the battery protection board 40 further includes a protection circuit 70, the protection circuit 70 may be disposed on the access board 41, and fig. 7 exemplarily shows a circuit diagram of a protection circuit, but a circuit structure of the protection circuit may have various manners, and the protection circuit employed on the battery protection board 40 of the present disclosure is not limited to the one manner. As shown in fig. 7, the protection circuit 70 may include: a protection circuit chip 71, one or more MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) switches, and a thermistor. B + is communicated with the positive electrode of the battery core, B-is communicated with the negative electrode of the battery core, P + is communicated with the positive electrode output by the battery protection plate 40, and P-is communicated with the negative electrode output by the battery protection plate 40. The protection circuit 70 protects the battery cell when overcharge, overdischarge, overcurrent, temperature abnormality, or the like occurs.

Fig. 7 shows an embodiment comprising two MOS switches: the first MOS switch 72 and the second MOS switch 73 both output high voltage in the CO and DO of the protection circuit chip 71 in a normal state, both the MOS switches are in an on state, and the battery cell can be charged and discharged freely.

In fig. 7, the protection circuit 70 may further include a capacitor 74, a resistor 75, and the like.

Among them, the thermistors shown in fig. 7 include a Positive Temperature Coefficient (PTC) thermistor 76 and a Negative Temperature Coefficient (NTC) thermistor 77, and when the ambient Temperature rises, the resistance thereof decreases, and the use of an electric device or a charging device can react in time to control the internal interruption to stop the charge and discharge.

In the charging process, when the protection circuit chip 71 detects that the battery voltage reaches the overcharge protection threshold, the CO pin outputs a low level, the second MOS switch 73 is turned from on to off, the charging loop is turned off, and the charger cannot charge the battery any more, so that the overcharge protection is realized.

In the discharging process, when the protection circuit chip 71 detects that the battery voltage is lower than the over-discharge protection threshold, the DO pin is changed from the high level to the low level, and the first MOS switch 72 is turned off, so that the battery cannot be discharged any more, and the over-discharge protection is realized. The battery voltage can not be reduced under the over-discharge protection state, the current of the protection circuit is required to be extremely small, and the control circuit enters low power consumption.

Normally, the battery discharges to the load, the current passes through the first MOS switch 72 and the second MOS switch 73 which are connected in series, and the voltage drop of the two MOS switches is detected by the VM pin as U. If the load causes U abnormality due to some reason, the loop current is increased, and when U is larger than a certain value, the DO pin is changed from high voltage to low voltage, the first MOS switch 72 is closed, so that the discharge loop current is zero, and the overcurrent protection effect is achieved.

Based on the same inventive concept, the embodiment of the present disclosure further provides a battery, including: a connector including a connector first pole and a connector second pole for outputting or inputting a current; a battery cell comprising a cell first pole and a cell second pole; and the battery protection plate 40 of any of the preceding embodiments, the battery protection plate 40 communicating the cell first pole with the connector first pole and the cell second pole with the connector second pole. Through the battery protection board 40 of the foregoing embodiment, when the battery electric core is protected, the size of the battery protection board is reduced, so that the occupied space is saved, the battery electric core can have a larger volume, and the electric quantity of the battery is larger. Or the volume of the whole battery is reduced under the condition that the original electric quantity is not changed.

Based on the same concept, the embodiment of the present disclosure further provides a terminal, where the terminal may be an electronic product such as a mobile phone and a notebook computer, or may also be a device such as an electric vehicle that needs to provide power through a battery, and the terminal includes one or more batteries of the foregoing embodiments. By adopting the battery of the foregoing embodiment, the size of the battery can be reduced in a limited space of the terminal while keeping the amount of power unchanged, thereby enabling the terminal to be miniaturized or saving space for other components.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A battery protection board, characterized in that, the battery protection board is used for connecting battery electricity core and connector, the battery protection board includes: the device comprises an access plate, a first splitter plate, a first connecting plate and a second connecting plate; wherein,

the access panel includes:

the first connection-out point is arranged at one end of the connection plate and is connected with a first pole of a connector of the connector through the first connection plate;

the second connection point is arranged at the other end of the connection plate opposite to the first connection point and is connected with a second pole of the connector through the second connecting plate;

a first access point, disposed between the first and second connection points, for connection to a first cell pole of the battery cell; and a process for the preparation of a coating,

a second access point disposed between the first access point and the second exit point, the second access point configured to be connected to a second cell pole of the battery cell;

the first flow distribution plate includes:

the first shunt access end is positioned at one end of the first shunt plate and connected to the first access point of the access plate or connected between the first access point and the second access point of the access plate; and a process for the preparation of a coating,

a first shunt outlet end located at the other end of the first shunt plate opposite to the first shunt inlet end, and connected to an electrical path from the second access point of the access plate to the second pole of the connector.

2. The battery protection plate according to claim 1, wherein the first shunt outlet is connected to the second outlet of the access plate or between the second inlet and the second outlet of the access plate.

3. The battery protection plate as claimed in claim 1, wherein the first tapping outlet is connected to the second connection plate.

4. The battery protection plate as claimed in claim 3, wherein the first flow dividing plate is integrally formed with the second connection plate.

5. The battery protection plate of claim 1, wherein the first flow distribution plate further comprises a flow distribution plate connecting the first flow inlet with the first connection plate.

6. The battery protection plate according to claim 5, wherein the first flow dividing plate is integrally formed with the first connection plate.

7. The battery protection plate as claimed in claim 5, wherein the first tapping outlet is connected to the second connection plate.

8. The battery protection plate according to claim 7, wherein the first flow dividing plate, the first connection plate, and the second connection plate are integrally formed.

9. The battery protection plate according to claim 8, wherein the first flow dividing plate, the first connection plate, and the second connection plate are integrally formed as a flexible circuit board.

10. The battery protection plate as claimed in claim 1, further comprising: a second splitter plate;

the second shunting plate includes:

the second shunt access end is positioned at one end of the second shunt plate and connected to the second access point of the access plate or connected between the first access point and the second access point of the access plate;

and the second shunt outlet end is positioned at the other end of the second shunt plate opposite to the first shunt inlet end and is connected to an electric path from the first access point of the access plate to the first pole of the connector.

11. The battery protection plate according to claim 1, wherein the first flow dividing plate, the first connection plate, and the second connection plate are connected to the access plate by welding.

12. The battery protection plate as claimed in claim 1, further comprising:

a protection circuit disposed in the access board, the protection circuit including: a protection circuit chip, an MOS switch and a thermistor.

13. The battery protection plate of claim 1, wherein the cell first pole is a positive pole and the cell second pole is a negative pole.

14. A battery, comprising:

a connector including a connector first pole and a connector second pole for outputting or inputting a current;

a battery cell comprising a cell first pole and a cell second pole;

the battery protection panel of any one of claims 1-13, the battery protection panel communicating the cell first pole with the connector first pole and the cell second pole with the connector second pole.

15. A terminal, characterized in that it comprises a battery according to claim 14 for providing electrical power.