CN112133876A - Batteries and Terminal Equipment - Google Patents

Abstract

The present disclosure provides a battery and terminal equipment. The battery includes a protection circuit board, a first battery cell, a second battery core, and a conductive member. The first battery cell includes a first tab and a third tab with different polarities. The second battery cell includes a second tab and a fourth tab with different polarities. The polarities of the first tab and the second tab are different. The first tab and the second tab are directly connected via the conductive member. The third tab and the fourth tab are respectively connected to the protection circuit board. In the battery according to the present disclosure, only the third tab and the fourth tab are directly connected to the protection circuit board, and the first tab and the second tab are not connected through the protection circuit board, but are connected independently from the protection circuit board. The conductive parts of the battery are connected to each other, thereby reducing the components arranged on the protection circuit board, effectively dispersing the heat source on the protection circuit board, reducing the temperature of the battery protection board, and reducing the temperature rise of the protection circuit board during fast charging. The temperature rise of the battery during charging.

Description

Batteries and Terminal Equipment

technical field

The present disclosure relates to the field of batteries, and in particular, to a battery and a terminal device.

Background technique

With the rapid development of fast charging technology in the fields of smartphones and electric vehicles, people's demand for high-performance batteries is also increasing and becoming more urgent. For battery products, the heat of the battery increases with the increase of the fast charging current. The increase in battery temperature and heat will seriously affect the fast charging effect, and may also cause safety problems. Therefore, how to reduce the battery temperature rise has become a bottleneck in the development of fast charging technology.

The battery is connected to the protection circuit board, and the battery is connected to the battery charging and discharging port through the protection circuit board to form a charging and discharging circuit to realize the charging and discharging of the battery. When a large current passes through the protection circuit board, the protection circuit board will generate serious heat. Because the layout space of the protection circuit board itself is very limited, the heat dissipation is slow, and the battery temperature rises during fast charging, which affects the fast charging effect.

SUMMARY OF THE INVENTION

In view of the defects in the prior art, the purpose of the present disclosure is to provide a battery and a terminal device, which can reduce the temperature rise of the battery during fast charging.

In order to achieve the above object, in one aspect, the present disclosure provides a battery, which includes a protection circuit board, a first battery cell, a second battery core, and a conductive member. The first battery cell includes a first tab and a third tab with different polarities. The second battery cell includes a second tab and a fourth tab with different polarities. The polarities of the first tab and the second tab are different. The first tab and the second tab are directly connected via the conductive member. The third tab and the fourth tab are respectively connected to the protection circuit board.

In some embodiments, the first cell includes a first body having a first side, and the first tab extends from the first side of the first body. The second cell includes a second body, the second body has a second side, and the second tab extends from the second side of the second body. The first side of the first body and the second side of the second body face the protection circuit board.

In some embodiments, the first tab and the second tab are bent and sandwich the conductive member in the thickness direction of the protective circuit board.

In some embodiments, the first tab has a first electrical connection segment that is electrically connected to the conductive member. The second tab has a second electrical connection segment that is electrically connected to the conductive member. Along the thickness direction of the protection circuit board, the first electrical connection segment and the second electrical connection segment are located between the protection circuit board and the conductive member.

In some embodiments, the conductive member includes opposing first and second surfaces. The first tab and the second tab are respectively connected to the first surface of the conductive member. A first insulating member is disposed between the second surface of the conductive member and the first tab. A second insulating member is disposed between the second surface of the conductive member and the second tab.

In some embodiments, on the side close to the second surface of the conductive member, a third insulating member is disposed on the outer side surface of the first tab that sandwiches the conductive member. On the side close to the second surface of the conductive member, a fourth insulating member is provided on the outer side surface of the second tab that sandwiches the conductive member. The first side of the first body and the second side of the second body are respectively disposed on both sides of the protection circuit board along a first direction of the protection circuit board, and the first direction intersects the thickness direction of the protection circuit board. The battery further includes a fifth insulating member disposed between the two sides of the protection circuit board along the first direction of the protection circuit board and the first side of the first body and the second side of the second body, respectively.

In some embodiments, along the thickness direction of the protection circuit board, a sixth insulating member is disposed between the first electrical connection segment and the second electrical connection segment and the protection circuit board.

In some embodiments, the conductive member has a first portion and a second portion. The first portion directly electrically connects the first tab and the second tab. The second part electrically connects the first part and the protection circuit board.

In some embodiments, the first cells are provided in multiples in number. Each first cell includes a first main body, the first main body has a first large surface and a first narrow surface, the first main bodies of the plurality of first cells are stacked in such a manner that the first large surface faces the first large surface, and the first large surface faces the first large surface. The tabs come in multiple settings stacked together. The second battery cells are provided in a plurality of numbers. Each second cell includes a second body, the second body has a second large surface and a second narrow surface, a plurality of second cells are stacked with the second largest facing the second large surface, and the second tabs are stacked Multiple settings together.

In order to achieve the above object, on the other hand, the present disclosure provides a terminal device including the aforementioned battery.

The beneficial effects of the present disclosure are as follows:

In the battery according to the present disclosure, the first tab of the first cell and the second tab of the second cell with different polarities are directly connected via a conductive member to electrically connect the first tab and the second tab; The third tab of the first cell and the fourth tab of the second cell with different polarities are respectively connected to the protection circuit board, and then the third tab and the fourth tab are connected to the battery charging and discharging port through the protection circuit board , and realize the series connection of the first cell and the second cell. In the battery of the present disclosure, only the third tab and the fourth tab are directly connected to the protection circuit board, the first tab and the second tab are not connected through the protection circuit board, but are The conductive parts are connected, thereby reducing the components arranged on the protection circuit board, effectively dispersing the heat source on the protection circuit board, reducing the temperature of the battery protection board, and reducing the temperature rise of the protection circuit board during fast charging. If the number of components on the board is reduced, the area of the protection circuit board can be reduced, and the influence of the temperature rise of the protection circuit board on the temperature rise of the battery can be reduced, thereby reducing the temperature rise of the battery during fast charging. Moreover, the current between the first tab and the second tab flows through the conductive member, so that the total current flowing through the battery protection board is reduced, the heat generation of the battery protection board is reduced, and the temperature rise of the battery during fast charging is reduced.

Description of drawings

FIG. 1 is a schematic diagram of a terminal device of the present disclosure.

2 is a schematic cross-sectional view of an embodiment of a battery of the present disclosure.

3 is a schematic diagram of the electrical connection between the first tab of the first cell and the second tab of the second cell of the embodiment of the battery of FIG. 2 and the conductive member, wherein the protection battery plate is not provided and the first tab, The second tab, the third tab and the fourth tab are in an unbent state.

4 is a schematic diagram of the electrical connection of the first cell, the second cell, the conductive member and the protective battery plate of the battery of FIG. 2 , wherein the first tab, the second tab, the third tab and the fourth tab in an unbent state.

5 is a schematic cross-sectional view of another embodiment of the battery of the present disclosure.

6 is a schematic cross-sectional view of yet another embodiment of the battery of the present disclosure.

7 is a perspective view of a conductive member and a protective circuit board of the battery of the present disclosure.

Among them, the reference numerals are described as follows:

200 Mobile phone 33 Fourth pole

100 battery 34 second packaging part

1 Protection circuit board 4 Conductive parts

S1 first board surface 40a first surface

P pad 40b second surface

2 The first cell 41 The main body

21 The first main body 42 The bending part

211 first side 5 first insulation

22 The first tab 51 The first fixing part

221 The first bending section 52 The first connecting part

222 first extension 53 first extension

223 The first bending section 6 The second insulating member

224 The first electrical connection section 61 The second fixing part

23 The third tab 62 The second connecting part

24 The first encapsulation part 63 The second extension part

3 The second cell 7 The third insulator

31 The second body 8 The fourth insulating member

311 second side 9 fifth insulation

32 The second tab 10 The sixth insulator

321 The second bending section 11 The seventh insulating part

322 The second extension T protects the thickness direction of the circuit board

323 The second bending section X protects the lateral direction of the circuit board

324 The thickness direction of the second electrical connection section T1 conductive member

Detailed ways

The drawings illustrate embodiments of the disclosure, and it is to be understood that the disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms, therefore, specific details disclosed herein are not to be interpreted as limiting , but only as a basis for the claims and as a representative basis for teaching one of ordinary skill in the art to variously employ the present disclosure.

In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are some, but not all, embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terms used herein in the specification of the application are for the purpose of describing particular embodiments only It is not intended to limit the present disclosure; the terms "comprising" and "having" and any variations thereof in the description and claims of the present disclosure and the above description of the drawings are intended to cover non-exclusive inclusions. In the description of the present disclosure, unless otherwise expressly specified and defined, the terms "first", "second", "third" and "fourth" in the description and claims of the present disclosure or the above-mentioned drawings , "fifth", "sixth", "seventh", etc. are used to distinguish different objects, but are not used to describe a specific order or primary and secondary relationship, nor can they be understood as indicating or implying relative importance. The terms "connected" and "connected" should be understood in a broad sense. For example, "connected" may be a fixed connection, or a detachable connection, or an integral connection, or an electrical connection, or a signal connection; "connection" may be directly connected. , or indirectly through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present disclosure. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor a separate or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The appearance of "plurality" in this disclosure refers to two or more (including two).

The batteries described in the embodiments of the present disclosure are suitable for various terminal devices using batteries, such as mobile phones, portable devices, notebook computers, battery cars, electric vehicles, ships, spacecraft, electric toys, and electric tools, etc.; the battery is the terminal The device provides power. The batteries described in the embodiments of the present disclosure are not only applicable to the terminal devices described above, but also applicable to all terminal devices using batteries. However, for the sake of brevity, the following embodiments are described by taking a mobile phone as an example. For example, FIG. 1 shows the structure of a mobile phone 200 , the mobile phone 200 is provided with a battery 100 inside, and the battery 100 provides power for the mobile phone 200 to meet the electricity demand when using the mobile phone.

2 to 4 , in some embodiments, the battery 100 includes a protection circuit board 1 , a first cell 2 , a second cell 3 and a conductive member 4 .

For the battery 100 , the functions and concepts of the protection circuit board 1 are well known to those skilled in the art, so only a brief description is given. The protection circuit board 1 is an integrated circuit board that protects the rechargeable battery (eg, lithium battery), and is used to prevent the battery 100 from being overcharged, overdischarged, overcurrent, short-circuited, and ultra-high temperature charge and discharge.

In some embodiments, a connector (not shown) may be installed on the protection circuit board 1, and the connector is used to connect with a terminal device (eg, a mobile phone, a notebook). Specifically, the protection circuit board 1 may be a flexible circuit board, and the flexible circuit board is relatively soft and easy to bend, which facilitates the connection of the connector with the terminal device.

In one embodiment, referring to FIGS. 2 to 6 , the first battery cell 2 includes a first tab 22 and a third tab 23 with different polarities. The second battery cell 3 includes a second tab 32 and a fourth tab 33 with different polarities. The polarities of the first tab 22 and the second tab 32 are different. That is, if the first tab 22 is a tab of positive polarity, the second tab 32 is a tab of negative polarity, and vice versa. In some embodiments, the first battery cell 2 and the second battery cell 3 are lithium battery cells.

The first battery cell 2 and the second battery cell 2 further include a packaging bag (not shown) and an electrode assembly (not shown) accommodated in the packaging bag. The electrode assembly includes a positive pole piece, a negative pole piece, and a separator separating the positive pole piece and the negative pole piece. In some embodiments, the electrode assembly may be formed by winding the positive pole piece, the negative pole piece and the diaphragm. The electrode assembly may be flatly extruded to form a flat shape. The packaging bag can be metal plastic film, such as aluminum plastic film or steel plastic film.

In the embodiment shown in FIG. 2 to FIG. 6 , the first tab 22 and the second tab 32 are directly connected via the conductive member 4 . The third tab 23 and the fourth tab 33 are respectively connected to the protection circuit board 1 . Thus, the electrical connection between the first cell 2 and the second cell 3 is realized.

Generally, all the tabs of the cells are connected to the protection circuit board 1 to realize the electrical connection between the cells. For example, the positive and negative tabs of one cell are connected to the battery protection board 1 respectively, and the positive and negative pins of the other cell are also connected to the battery protection board 1 respectively, and the two cells are connected in series through the battery protection board 1 . When the two cells are directly connected to the battery protection board 1 to realize the electrical connection between the two cells, a large current will pass through the battery protection board 1, and the battery protection board 1 will generate serious heat. In addition, due to the structure of the battery protection board 1 The small layout space leads to slow heat dissipation, and the battery temperature rises during fast charging, which will affect the fast charging effect and even cause safety problems.

In the battery 100 according to the present disclosure, the first tab 22 of the first cell 2 and the second tab 32 of the second cell 3 with different polarities are directly connected via the conductive member 4 to electrically connect the first tab 22 and the second tab 32; the third tab 23 of the first cell 2 and the fourth tab 33 of the second cell 3 with different polarities are respectively connected to the protection circuit board 1, and then the third tab 23 and The fourth tab 33 is connected to the battery charging and discharging port (not shown) through the protection circuit board 1 , and realizes the series connection of the first battery cell 2 and the second battery cell 3 . In the battery 100 of the present disclosure, only the third tab 23 and the fourth tab 33 are directly connected to the protection circuit board 1 , and the first tab 22 and the second tab 32 are not connected through the protection circuit board 1 , but are It is connected independently of the conductive member 4 outside the protection circuit board 1, thereby reducing the number of components arranged on the protection circuit board 1, effectively dispersing the heat source on the protection circuit board 1, reducing the temperature of the battery protection board 1, and reducing the time of fast charging. The effect of protecting the temperature rise of the circuit board 1, and because the components on the protection circuit board 1 are reduced, the area of the protection circuit board 1 can be reduced, and the influence of the temperature rise of the protection circuit board 1 on the temperature rise of the battery 100 can be reduced, thereby reducing the The temperature rise of the battery 100 during fast charging. Moreover, the current between the first tab 22 and the second tab 32 flows through the conductive member 4, so that the total current flowing through the battery protection board 1 is reduced, and the heat generation of the battery protection board 1 is reduced, thereby reducing the fast charging time. The temperature rise of the battery 100 .

Specifically, referring to FIGS. 2 to 6 , the first battery cell 2 includes a first body 21 . The first body 21 has a first side 211 from which the first tabs 22 extend. Similarly, the second cell 3 includes a second body 31 . The second body 31 has a second side 311 from which the second tabs 32 extend. The first side 211 of the first body 21 and the second side 311 of the second body 31 face the protection circuit board 1 .

The first direction of the protection circuit board 1 is defined as a direction intersecting the thickness direction T of the protection circuit board 1 . Wherein, in the case where the first side 211 of the first body 21 and the second side 311 of the second body 31 face the protection circuit board 1, the relative positional relationship between the first body 21 and the second body 31 can be configured That is, the first main body 21 and the second main body 31 are respectively disposed on both sides of the protection circuit board 1 along the first direction of the protection circuit board 1 , that is, the protection circuit board 1 has two side surfaces, and the two side surfaces are respectively located on the protection circuit board On both sides of the 1 in the direction intersecting the thickness direction T, the two side surfaces are respectively opposite to the first side 211 of the first body 21 and the second side 311 of the second body 31 , as shown in FIGS. 2 to 5 . The relative positional relationship between the first body 21 and the second body 31 can also be configured such that the first body 21 and the second body 31 are disposed on the same side of the protection circuit board 1 along the first direction of the protection circuit board 1 . Alternatively, the relative positional relationship between the first body 21 and the second body 31 can also be configured such that the first body 21 and the second body 31 are disposed on the same side of the protection circuit board 1 along the thickness direction T of the protection circuit board 1 , such as shown in Figure 6.

Specifically, taking the first direction of the protection circuit board 1 as the lateral direction X of the protection circuit board 1 as an example, the lateral direction X of the protection circuit board 1 is the direction perpendicular to the thickness direction T of the protection circuit board 1 , as shown in FIGS. 2 to 4 . In the embodiment shown and the embodiment shown in FIG. 5 , the first body 21 and the second body 31 are respectively disposed on both sides of the protection circuit board 1 along the lateral direction X of the protection circuit board 1 , but of course not limited thereto. Wherein, the first battery cell 2 and the second battery cell 3 may be arranged in a mirror image relative to the protection circuit board 1 to reasonably arrange the space in the battery 100 .

Referring to FIG. 3 , FIG. 4 and FIG. 7 , in some embodiments, the conductive member 4 may be formed as a flat plate-like structure. The material of the conductive member 4 may be a nickel-plated copper sheet or a nickel sheet with good electrical conductivity.

2 to 6 , in order to improve the space utilization of the battery 100 , the first tab 22 and the second tab 32 are bent and the conductive member 4 is sandwiched in the thickness direction T of the protection circuit board 1 , so that the first tab The tab 22 and the second tab 32 are directly connected via the conductive member 4 .

As shown in FIGS. 2, 5 and 6, in some embodiments, the conductive member 4 includes opposing first and second surfaces 40a and 40b. The first tab 22 and the second tab 32 are respectively connected to the first surface 40 a of the conductive member 4 . A first insulating member 5 is disposed between the second surface 40b of the conductive member 4 and the first tab 22 . A second insulating member 6 is disposed between the second surface 40b of the conductive member 4 and the second tab 32 . In FIG. 2, the first surface 40a is closer to the protective circuit board 1 than the second surface 40b. The first insulating member 5 can insulate and protect the first tab 22 , and play a role of supporting the first tab 22 to prevent the first tab 22 from being deformed by external force during operation and affecting its performance. Similarly, the second insulator 6 can insulate and protect the second tab 32 and play a role of supporting the second tab 32 to prevent the second tab 32 from being deformed by external force during operation and affecting its performance.

2 , 5 and 6 , in some embodiments, the first tab 22 has a first electrical connection segment 224 that is electrically connected to the conductive member 4 . Further, the first tab 22 may further include a first bending section 221 , a first extending section 222 and a first bending section 223 . In the figure, the first bending section 221 is bent toward the conductive member 4 and toward the first side 211 of the first body 21 . The first extension section 222 extends from the first bent section 221 toward the first side 211 of the first body 21 . The first bending section 223 is bent from the first extending section 222 toward the protection circuit board 1 and away from the first side 211 of the first body 21 . The first electrical connection section 224 extends from the first curved section 223 away from the first side 211 of the first body 21 . The first extension section 222 and the first electrical connection section 224 are located on both sides of the conductive member 4 in the thickness direction T1 . By configuring the structure of the first tab 22 in the above-mentioned manner, the first tab 22 and the conductive member 4 can be reliably connected, and the space occupied by the first tab 22 can be saved at the same time. small space between.

Similar to the first tab 22 , the second tab 32 has a second electrical connection segment 324 that is electrically connected to the conductive member 4 . Further, the second tab 32 may further include a second bending section 321 , a second extending section 322 and a second bending section 323 . The second bending section 321 is bent toward the conductive member 4 and toward the second side 311 of the second body 31 . The second extension section 322 extends from the second bent section 321 toward the second side 311 of the second body 31 . The second curved section 323 is bent from the second extension section 322 toward the protection circuit board 1 and away from the second side 311 of the second body 31 . The second electrical connection section 324 extends from the second curved section 323 away from the second side 311 of the second body 31 . The second extension section 322 and the second electrical connection section 324 are located on both sides of the conductive member 4 in the thickness direction T1 . By configuring the structure of the second tab 32 in the above manner, the second tab 32 and the conductive member 4 can be reliably connected, and the space occupied by the second tab 32 can be saved at the same time. small space between.

2 , 5 and 6 , in some embodiments, along the thickness direction T of the protection circuit board 1 , the first electrical connection segment 224 and the second electrical connection segment 324 may be located between the protection circuit board 1 and the conductive member 4 between. In the figure, the protection circuit board 1 has a first board surface S1 along the thickness direction T thereof. The first electrical connection section 224 is located between the conductive member 4 and the first board surface S1 of the protection circuit board 1 , the first electrical connection section 224 is electrically connected to the conductive member 4 , and the first electrical connection section 224 is A board surface S1 is electrically insulated to prevent the connection between the first electrical connection section 224 of the first tab 22 and the conductive member 4 from being interfered by the signal of the protection circuit board 1 . The second electrical connection section 324 is located between the conductive member 4 and the first board surface S1 of the protection circuit board 1 , the second electrical connection section 324 is electrically connected to the conductive member 4 , and the second electrical connection section 324 is A board surface S1 is electrically insulated to prevent the connection between the second electrical connection section 324 of the second tab 32 and the conductive member 4 from being interfered by the signal of the protection circuit board 1 .

The specific structures of the aforementioned first insulating member 5 and second insulating member 6 can be arbitrarily configured. 2 , 5 and 6 , in some embodiments, the first insulating member 5 may include a first fixing part 51 , a first connecting part 52 and a first extending part 53 . The first fixing portion 51 is fixed between the first extending section 222 and the conductive member 4 . The first connecting portion 52 extends from the first fixing portion 51 away from the conductive member 4 and is located on a side of the first bending section 221 away from the first main body 21 . The first extension portion 53 extends from the first connection portion 52 toward the first side 211 of the first body 21 . The first fixing portion 51 and the first extending portion 53 are located on two sides of the first bending section 221 and the first extending section 222 respectively, so as to sufficiently insulate and protect the first tab 22 . The first insulating member 5 can be an insulating tape, which acts as an adhesive while insulating and protecting, preventing the bent first tab 22 from rebounding, and avoiding affecting the effect of the electrical connection between the first tab 22 and the conductive member 4 .

Similar to the first insulating member 5 , the second insulating member 6 may include a second fixing portion 61 , a second connecting portion 62 and a second extending portion 63 . The second fixing portion 61 is fixed between the second extending section 322 and the conductive member 4 . The second connecting portion 62 extends from the second fixing portion 61 away from the conductive member 4 and is located at a side of the second bending section 321 away from the second body 31 . The second extension portion 63 extends from the second connection portion 62 toward the second side 311 of the second body 31 . The second fixing portion 61 and the second extending portion 63 are located on both sides of the second bending section 321 and the second extending section 322 respectively, so as to sufficiently insulate and protect the second tab 32 . The second insulating member 6 can be an insulating tape, which acts as an adhesive while insulating and protecting, preventing the bent second tab 32 from rebounding, and avoiding affecting the effect of the electrical connection between the second tab 32 and the conductive member 4 .

Referring to FIG. 2 , FIG. 5 and FIG. 6 , in some embodiments, the first battery cell 2 further includes a first packaging part 24 . The first encapsulation part 24 is located on the first side 211 of the first body 21 . The first bending section 221 is exposed from the first packaging part 24 . The battery may further include a third insulating member 7 located between the first encapsulation part 24 and the first extending section 222 . For example, referring to FIG. 2 , on the side close to the second surface 40 b of the conductive member 4 , the third insulating member 7 is disposed on the outer side surface of the first tab 22 sandwiching the conductive member 4 . The third insulating member 7 insulates and isolates the first extension section 222 from the first encapsulation portion 24 , so as to insulate and protect the first extension section 222 .

Referring to FIG. 2 , FIG. 5 and FIG. 6 , in some embodiments, the second battery cell 3 further includes a second packaging part 34 . The second encapsulation part 34 is located on the second side 311 of the second body 31 . The second bending section 321 is exposed from the second packaging portion 34 . The battery may further include a fourth insulating member 8 located between the second encapsulation portion 34 and the second extending section 322 . For example, referring to FIG. 2 , on the side close to the second surface 40 b of the conductive member 4 , the fourth insulating member 8 is disposed on the outer side surface of the second tab 32 sandwiching the conductive member 4 . The fourth insulating member 8 insulates and isolates the second extension section 322 from the second encapsulation portion 34 , so as to insulate and protect the second extension section 322 .

2 , 5 and 6 , in some embodiments, the battery 100 further includes a fifth insulating member 9 . The fifth insulating members 9 are respectively disposed between the two sides of the protection circuit board 1 along the first direction of the protection circuit board 1 and the first side 211 of the first body 21 and the second side 311 of the second body 31 . The fifth insulating member 9 insulates and isolates the protection circuit board 1 from the first body 21 and the second body 31, respectively.

Referring to FIG. 2 , FIG. 5 and FIG. 6 , in some embodiments, along the thickness direction T of the protection circuit board 1 , a sixth electrical connection section 224 and the second electrical connection section 324 and the protection circuit board 1 are provided with a sixth Insulator 10 . Specifically, the sixth insulating member 10 may be disposed between the first electrical connection segment 224 and the second electrical connection segment 324 and the first board surface S1 of the protection circuit board 1 . The sixth insulating member 10 electrically insulates the first electrical connection segment 224 and the second electrical connection segment 324 from the first board surface S1 of the protection circuit board 1 . In addition, the sixth insulating member 10 also electrically insulates the conductive member 4 from the first board surface S1 of the protection circuit board 1 .

In the embodiments shown in FIGS. 4 and 6 , the first battery cell 2 and the second battery cell 3 are provided in one number. Referring to FIG. 5 , in some embodiments, the first battery cell 2 and the second battery cell 3 are provided in multiple numbers. In FIG. 5 , there are two first cells 2 and two second cells 3 respectively. The two first cells 2 connected in parallel and the two second cells 3 connected in parallel pass through the conductive member 4 and the protection circuit board 1 . Do concatenation. The first body 21 has a first large surface and a first narrow surface. The second body 31 has a second large surface and a second narrow surface. The first bodies 21 of the plurality of first cells 2 are stacked in such a manner that the first large faces face the first large surface, and the first tabs 22 are arranged in a plurality of layers stacked together. The plurality of second cells 3 are stacked in a manner that the second largest faces the second largest surface, and the second tabs 32 are arranged in a plurality of layers stacked together. The numbers of the first battery cells 2 and the second battery cells 3 can be arbitrarily set according to actual working conditions.

Referring to FIGS. 4 and 7 , in some embodiments, the conductive member 4 has a first portion 41 and a second portion 42 . The first portion 41 directly electrically connects the first tab 22 and the second tab 32 . The second part 42 electrically connects the first part 41 and the protection circuit board 1 . The second part 42 is used for signal acquisition of the conductive element 4 . Specifically, the second part 42 is bent from the first part 41 to the protection circuit board 1 and extends along the outer side of the protection circuit board 1 away from the first tab 22 and the second tab 32 , so that the first tab can be avoided The electrical connection of 22 and the second tab 32 to the conductive member 4 is affected by the protection circuit board 1 . In addition, since the conductive member 4 needs to be signal collected, the conductive member 4 is connected to the protection circuit board 1, and there is a height difference between the conductive member 4 and the protection circuit board 1, so the second part 42 is set to bend toward the protection circuit board 1 to compensate for the height difference between the conductive member 4 and the battery protection board 1 . Wherein, the first tab 22 and the second tab 32 can be respectively welded and connected to the first part 41 . The second part 42 may be connected to the protection circuit board 1 by way of bonding pads.

2 , 5 and 6 , in some embodiments, a seventh insulating member 11 is further provided on the surface of the conductive member 4 that is electrically connected to the first electrical connection segment 224 and the second electrical connection segment 324 . The seventh insulating member 11 is located between the first electrical connection segment 224 and the second electrical connection segment 324 . The first electrical connection section 224 and the second electrical connection section 324 are spaced apart and supported by the seventh insulating member 11 to prevent the first electrical connection section 224 from being damaged when the protection circuit board 1 or the conductive member 4 is subjected to external action. And the second electrical connection segment 324 is squeezed and deformed to affect the electrical connection effect between the first electrical connection segment 224 and the conductive member 4 and/or between the second electrical connection segment 324 and the conductive member 4 .

The above-mentioned first insulating member 5, second insulating member 6, third insulating member 7, fourth insulating member 8, fifth insulating member 9, sixth insulating member 10 and seventh insulating member 11 may be insulating tape or insulating paper , but not limited to this. Insulating tape or insulating paper can be used in the form of bonding and covering, which can play a role of positioning and fixing while ensuring insulation protection.

In the battery 100 of the present disclosure, the first tab 22 and the second tab 32 may be connected to the conductive member 4 by welding, respectively, and the third tab 23 and the fourth tab 33 may also be connected to the protection circuit board 1 by welding, respectively. Connected (as shown in FIG. 7, welding can be achieved through the pad P) to connect the first cell 2 and the second cell 3 in series, and further, the third tab 23 and the fourth tab 33 pass through the protection circuit The board 1 is connected with the battery charging and discharging port to form a charging and discharging circuit, so as to realize the charging and discharging of the battery 100 .

The foregoing detailed description describes various exemplary embodiments, but is not intended to be limited to the explicitly disclosed combinations. Thus, unless stated otherwise, various features disclosed herein may be combined together to form various additional combinations not shown for brevity purposes.

The above descriptions are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims (10)

1. A battery, characterized in that, The battery includes a protection circuit board, a first cell, a second cell and a conductive member; the first cell includes a first tab and a third tab with different polarities; The second cell includes a second tab and a fourth tab with different polarities; the polarities of the first tab and the second tab are different; The first tab and the second tab are directly connected via the conductive member; the third tab and the fourth tab are respectively connected to the protection circuit board. 2. The battery according to claim 1, characterized in that, The first cell includes a first body, the first body has a first side, and the first tab extends from the first side of the first body, The second cell includes a second body, the second body has a second side, and the second tab extends from the second side of the second body; The first side of the first body and the second side of the second body face the protection circuit board. 3. The battery according to claim 2, wherein The first tab and the second tab are bent and sandwich the conductive member in the thickness direction of the protection circuit board. 4. The battery according to claim 2 or 3, characterized in that, The first tab has a first electrical connection segment that is electrically connected to the conductive member, The second tab has a second electrical connection segment electrically connected to the conductive member, Along the thickness direction of the protection circuit board, the first electrical connection segment and the second electrical connection segment are located between the protection circuit board and the conductive member. 5. The battery according to claim 3, wherein The conductive member includes a first surface and a second surface opposite to each other, and the first tab and the second tab are respectively connected to the first surface of the conductive member; A first insulating member is arranged between the second surface of the conductive member and the first tab; A second insulating member is disposed between the second surface of the conductive member and the second tab. 6. The battery according to claim 5, characterized in that, On the side close to the second surface of the conductive member, a third insulating member is provided on the outer side surface of the first tab that sandwiches the conductive member; On the side close to the second surface of the conductive member, a fourth insulating member is provided on the outer side surface of the second tab that sandwiches the conductive member; The first side of the first body and the second side of the second body are respectively disposed on both sides of the protection circuit board along a first direction of the protection circuit board, and the first direction intersects the thickness direction of the protection circuit board; The battery further includes a fifth insulating member disposed between the two sides of the protection circuit board along the first direction of the protection circuit board and the first side of the first body and the second side of the second body, respectively. 7. The battery of claim 4, wherein Along the thickness direction of the protection circuit board, a sixth insulating member is disposed between the first electrical connection segment and the second electrical connection segment and the protection circuit board. 8. The battery of claim 1, wherein The conductive member has a first part and a second part, The first part directly electrically connects the first tab and the second tab; The second part electrically connects the first part and the protection circuit board. 9. The battery of claim 1, wherein The first cells are arranged in a plurality of numbers, each of the first cells includes a first main body, the first main body has a first large surface and a first narrow surface, and the first main bodies of the plurality of first cells have a first large surface. stacked facing the first large surface, the first tabs are arranged in multiple layers stacked together; The second battery cells are arranged in multiple numbers, each second battery core includes a second body, the second body has a second large surface and a second narrow surface, and the plurality of second battery cells face the second battery cell with the second large surface Stacked in a large-scale manner, the second tabs are arranged in multiple layers stacked together. 10. A terminal device, characterized in that the terminal device comprises the battery according to any one of claims 1-9.

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