CN220873737U - Battery assembly and portable terminal device - Google Patents

Abstract

The present disclosure relates to a battery pack and a portable terminal device, which belong to the technical field of batteries. The battery assembly comprises a first battery body, a connecting piece and a first battery protection board; the first battery body comprises a first battery cell assembly and a first tab; the connecting piece comprises a first connecting part and a second connecting part, the first connecting part is attached to the first tab and connected with the second connecting part, and the first tab is clamped and fixed by the first connecting part and the second connecting part; the first battery protection plate is connected with the first connection portion. By adopting the method, when any one of the first battery body and the first battery protection plate fails, the maintenance cost of the battery assembly can be reduced.

Description

Battery assembly and portable terminal device

Technical Field

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

Background

The battery assembly is a key component in the terminal equipment. The battery assembly comprises a battery body and a battery protection board, wherein the battery protection board is used for controlling charge and discharge, and can prevent the battery body from being overcharged and overheated in the use process, so that the working stability and the safety of the battery assembly are ensured.

Currently, in a battery pack, a battery body and a battery protection plate are generally welded directly together. When any one of the battery body and the battery protection plate fails, the whole battery assembly can only be scrapped, and the brand new battery assembly can be selected and replaced, so that the cost is high.

Disclosure of utility model

The embodiment of the disclosure provides a battery assembly and a portable terminal device, which can solve the technical problems existing in the related art, and the technical scheme is as follows:

In a first aspect, embodiments of the present disclosure provide a battery assembly including a first battery body, a connector, and a first battery protection plate;

the first battery body comprises a first battery cell assembly and a first tab;

The connecting piece comprises a first connecting part and a second connecting part, the first connecting part is attached to the first tab and connected with the second connecting part, and the first tab is clamped and fixed by the first connecting part and the second connecting part;

the first battery protection plate is connected with the first connection portion.

In one possible implementation, the first connection portion includes a fitting section and a bending section;

The attaching section is of a platy structure and is attached to the first tab;

one end of the bending section is connected with the attaching section;

The second connecting part is positioned at one side of the first tab, which is far away from the attaching section, and is connected with the other end of the bending section, and the second connecting part and the attaching section are used for clamping and fixing the first tab;

The first battery protection board is located the laminating section is kept away from one side of second connecting portion, and with the laminating section links to each other.

In one possible implementation, the second connection has a wave-shaped plate-like structure.

In one possible implementation manner, the first connection part is provided with a containing groove, the containing groove is provided with a first wall surface and a second wall surface which are opposite, the first wall surface is attached to the first tab, and the second wall surface is provided with a mounting through hole;

The second connecting part is positioned in the mounting through hole and connected with the mounting through hole, and the first lug is clamped and fixed by the second connecting part and the first wall surface.

In one possible implementation, the second connection portion is an interference fit with the mounting through hole.

In one possible implementation manner, the second connecting portion has an annular structure, the second connecting portion is sleeved on the outer ring of the fitting portion of the first connecting portion and the first tab, and the inner ring of the first connecting portion and the inner ring of the second connecting portion clamp and fix the first tab.

In a second aspect, embodiments of the present disclosure provide a battery assembly including a second battery protection plate, a second battery body, and a fixture;

the second battery protection plate is provided with a groove structure;

The second battery body comprises a second electric core component and a second lug, one end of the second lug is connected with the second electric core component, and the other end of the second lug is positioned in the groove structure and is attached to the bottom of the groove structure;

The fixing piece is clamped with the groove structure, and the fixing piece and the groove bottom clamp and fix the other end of the second lug.

In one possible implementation manner, the side wall of the groove structure is provided with a clamping groove, the side wall of the fixing piece is provided with a clamping protrusion, and the clamping protrusion is matched with the clamping groove;

The clamping groove comprises a first groove part and a second groove part, the first groove part extends in a first direction, the first direction is the groove depth direction of the groove structure, the second groove part extends in a second direction on the side wall of the groove structure, and the second direction is orthogonal to the first direction.

In a third aspect, embodiments of the present disclosure provide a battery assembly including a third battery body and a third battery protection plate;

The third battery body comprises a third electric core component and a third lug;

The third battery protection board comprises a first circuit board and a second circuit board, the first circuit board is attached to the third electrode lug, the second circuit board is located on one side, away from the first circuit board, of the third electrode lug and is adhered to the first circuit board, and the first circuit board and the second circuit board are clamped and fixed to the third electrode lug.

In a fourth aspect, embodiments of the present disclosure provide a portable terminal device including any one of the battery assembly of the first aspect and its possible implementation manner, the second aspect and its possible implementation manner, and the third aspect and its possible implementation manner.

The technical scheme provided by the embodiment of the disclosure at least comprises the following beneficial effects:

The embodiment of the disclosure provides a battery assembly, in which a first battery body comprises a first cell assembly and a first tab. The connecting piece comprises a first connecting part and a second connecting part, wherein the first connecting part is attached to the first tab and is connected with the second connecting part, and the first tab is clamped and fixed by the first connecting part and the second connecting part. The first battery protection plate is connected to the first connection portion. Like this, first connecting portion and second connecting portion can the centre gripping fixed first utmost point ear, and first battery protection shield links to each other with first connecting portion, realizes electric connection with first utmost point ear through first connecting portion. When any one of the first battery protection plate and the first battery body fails, the first connecting part and the second connecting part can be separated, so that the first battery protection plate and the first battery body are separated, and the part which does not fail can still be used continuously, and the cost is reduced.

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

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic structural view of a battery assembly according to an embodiment of the present disclosure;

Fig. 2 is a schematic structural view of a battery assembly according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of a battery assembly according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a battery assembly according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a groove structure according to an embodiment of the present disclosure;

fig. 6 is a schematic structural view of a battery assembly according to an embodiment of the present disclosure;

fig. 7 is a schematic structural view of a battery assembly according to an embodiment of the present disclosure;

fig. 8 is a schematic structural view of a battery assembly according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural view of a cushioning assembly shown in an embodiment of the present disclosure;

fig. 10 is a schematic structural view of a cushioning assembly according to an embodiment of the present disclosure.

Description of the drawings

1. A first battery body;

11. a first cell assembly; 12. a first tab;

2. a connecting piece;

21. a first connection portion; 22. a second connecting portion;

211. A bonding section; 212. bending sections; 213. a receiving groove; 214. mounting through holes;

3. a first battery protection plate;

4. a buffer assembly;

41. A housing; 42. a buffer medium; 43. a reinforcing plate;

01. A second battery protection plate;

011. A groove structure;

0111. The bottom of the groove structure; 0112. a clamping groove;

01121. a first groove portion; 01122. a second groove portion;

02. a second battery body;

021. a second cell assembly; 022. a second lug;

03. A fixing member;

031. The clamping bulge;

100. a third battery body;

110. a third cell assembly; 120. a third ear;

200. A third battery protection plate;

210. A first circuit board; 220. and a second circuit board.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

In a portable terminal device (e.g., a mobile phone), a battery module is used to supply power to other components, which is one of the most important components in the portable terminal. The battery module is generally provided with a battery protection plate and a battery body, and the battery protection plate is electrically connected with the battery body. The battery protection board is used for preventing the battery body from being overcharged and overheated, and further guaranteeing the use safety of the portable terminal device. Currently, the battery protection plate is generally welded directly to the battery body, which results in high maintenance costs if either one of the battery protection plate and the battery body fails, and only the two components can be replaced at the same time during maintenance.

The embodiment of the present disclosure provides a battery assembly, as shown in fig. 1, including a first battery body 1, a connection member 2, and a first battery protection plate 3.

The first battery body 1 includes a first electric core component 11 and a first tab 12. The connecting piece 2 comprises a first connecting part 21 and a second connecting part 22, the first connecting part 21 is attached to the first tab 12 and is connected with the second connecting part 22, and the first tab 12 is clamped and fixed by the first connecting part 21 and the second connecting part 22. The first battery protection plate 3 is connected to the first connection portion 21.

In this way, the first connection portion 21 and the second connection portion 22 can clamp and fix the first tab 12, the first battery protection plate 3 is connected to the first connection portion 21, and the first connection portion 21 is electrically connected to the first tab 12. When any one of the first battery protection plate and the first battery body fails, the first connection part 21 and the second connection part 22 can be separated, so that the first battery protection plate 3 and the first battery body 1 can be separated, and the part which does not fail can still be used continuously, thereby reducing the cost.

In some possible embodiments, the first connection 21 includes a conforming section 211 and a bending section 212.

As shown in fig. 1, the attaching section 211 has a plate-like structure and is attached to the first tab 12. One end of the bending section 212 is connected with the attaching section 211, the second connecting portion 22 is located at one side of the first tab 12 away from the attaching section 211 and is attached to the other end of the bending section, and the second connecting portion 22 and the attaching section 211 are used for clamping and fixing the first tab 12. The first battery protection plate 3 is located at a side of the attaching section 211 away from the second connecting portion 22, and is connected to the attaching section 211.

Wherein, the connection mode between the attaching section 211 and the first battery protection plate 3 is welding.

In this way, the attaching section 211 and the second connecting portion 22 can clamp and fix the first tab 12, and the first battery protection plate 3 is connected with the first connecting portion 21, so as to realize electrical connection with the first tab 12 through the first connecting portion 21. When any one of the first battery protection plate and the first battery body fails, forces in different directions can be applied to the attaching section 211 and the second connecting portion 22, so that the bending section 212 deforms, the distance between the attaching section 211 and the second connecting portion 22 is increased, and the first tab 12 is taken out from between the attaching section 211 and the second connecting portion 22, so that the first battery protection plate 3 and the first battery body 1 are separated, and the part which does not fail can still be used continuously, and the cost is reduced.

In one example, the laminating section 211, the bending section 212 and the second connecting portion 22 are integrally formed.

In this way, the structural stability of the second connection portion 22 can be improved, and the probability of deformation of the second connection portion 22 when the portable terminal device collides can be reduced.

The processing manners of the attaching section 211, the bending section 212 and the second connecting portion 22 may be press forming or casting forming, and the processing manners of the attaching section 211, the bending section 212 and the second connecting portion 22 are not limited in this embodiment of the disclosure.

Illustratively, the material of the attaching portion 211, the bending portion 212 and the second connecting portion 22 may be metallic nickel.

Thus, the resistance between the first tab 12 and the connection member 2 can be reduced, and heat generation can be reduced.

Alternatively, as shown in fig. 1, the second connection portion 22 has a wavy plate-like structure.

In this way, the stability of clamping and fixing the first tab 12 between the attaching section 211 and the second connecting portion 22 can be improved.

In one example, referring to fig. 7, after the integrally formed bonding section 211, the bending section 212 and the second connection part 22 are finished, the bonding section 211 and the first battery protection plate 3 may be welded to achieve the electrical connection between the connection member 2 and the first battery protection plate 3. Then, the first tab 12 that is not bent is clamped and fixed by the second connection portion 22 and the attaching section 211, and then the first tab 12 may be bent, referring to fig. 1, to complete the assembly between the first battery protection plate 3 and the first battery body 1.

Like this, for other modes of equipment first battery body and first battery protection shield, only need buckle first utmost point ear 12, can accomplish the equipment between first battery protection shield 3 and the first battery body 1, no longer need carry out welding work to first utmost point ear, simplified battery module's production flow, and then can improve battery module's production efficiency.

In some possible embodiments, the first connection portion 21 has a receiving groove 213.

As shown in fig. 2, the first connection portion 21 has a receiving groove 213, the receiving groove 213 has opposite first and second wall surfaces, the first wall surface is attached to the first tab 12, and the second wall surface has a mounting through hole 214. The second connecting portion 22 is located in the mounting through hole 214 and is connected to the mounting through hole 214, and the second connecting portion 22 and the first wall face clamp and fix the first tab 12.

Wherein, the distance between the first wall surface and the second wall surface is greater than the thickness of the first tab 12. The shape of the mounting through hole 214 matches the shape of the second connecting portion 22.

The shape of the second connection portion 22 may be rectangular or circular, and the shape of the second connection portion 22 is not limited in the embodiments of the present disclosure.

In implementation, in the process of assembling the first battery protection plate 3 and the first battery body 1, the first connection portion 21 and the first battery protection plate 3 may be welded, then the first tab 12 is placed in the accommodating groove 213, the end portion of the first tab 12 is attached to the groove bottom of the accommodating groove 213, then the second connection portion 22 is placed in the mounting through hole 214, the second connection portion 22 is attached to the first tab 12, and the first tab 12 is clamped and fixed by the second connection portion 22 and the first wall surface.

In this way, the second connection portion 22 and the first wall surface can clamp and fix the first tab 12, and the first battery protection plate 3 is connected to the first connection portion 21, and is electrically connected to the first tab 12 through the first connection portion 21. When any one of the first battery protection plate and the first battery body fails, the second connection part 22 can be taken out from the mounting through hole 214, so that the first battery protection plate 3 and the first battery body 1 are separated, and the component which does not fail can still be used continuously, thereby reducing the cost.

In one example, the second connection 22 is an interference fit with the mounting through hole 214.

In this way, the second connection portion 22 and the first wall surface can be prevented from loosening when clamping and fixing the first tab 12, and connection stability between the first tab 12 and the connection member 2 is further improved.

In some possible embodiments, the second connection 22 has a ring-like structure.

As shown in fig. 3, the second connection portion 22 is looped around the outer ring of the portion where the first connection portion 21 and the first tab 12 are attached, and the first connection portion 21 and the inner ring of the second connection portion 22 clamp and fix the first tab 12.

In one example, the portion of the first connection portion 21 for fitting with the first tab 12 is parallel to the portion of the first tab 12 for fitting with the first connection portion 21.

In this way, the connection stability between the first connection portion 21 and the first tab 12 can be improved.

In practice, in the process of assembling the first battery protection plate 3 and the first battery body 1, the first connection portion 21 and the first battery protection plate 3 may be welded, the first connection portion 21 may be bent so that one end of the first connection portion 21, which is not connected to the first battery protection plate 3, is parallel to the first tab 12, then one end of the first connection portion 21, which is not connected to the first battery protection plate 3, may be moved toward the first tab 12 so as to be attached to each other, and then an attaching portion of the first connection portion 21 and the first tab 12 may be placed in an injection molding container. Injecting molten hot melt adhesive (namely, the second connecting part 22 in a molten state) into an injection molding container, cooling, demolding the hot melt adhesive to obtain the second connecting part 22, and clamping and fixing the first tab 12 by using the inner ring of the second connecting part 22 and the first connecting part 21.

In this way, the inner ring of the second connection portion 22 and the first connection portion 21 can clamp and fix the first tab 12, and the first battery protection plate 3 is connected to the first connection portion 21, and is electrically connected to the first tab 12 through the first connection portion 21. When any one of the first battery protection plate and the first battery body fails, the second connection part 22 can be heated, so that the second connection part 22 is repeatedly converted into a molten state, and the first tab 12 and the first connection part 21 are separated, so that the first battery protection plate 3 and the first battery body 1 are separated, and the part which does not fail can still be continuously used, and the cost is reduced.

The present disclosure provides a battery assembly in which a first battery body 1 includes a first cell assembly 11 and a first tab 12. The connecting piece 2 comprises a first connecting part 21 and a second connecting part 22, the first connecting part 21 is attached to the first tab 12 and is connected with the second connecting part 22, and the first tab 12 is clamped and fixed by the first connecting part 21 and the second connecting part 22. The first battery protection plate 3 is connected to the first connection portion 21. In this way, the first connection portion 21 and the second connection portion 22 can clamp and fix the first tab 12, the first battery protection plate 3 is connected to the first connection portion 21, and the first connection portion 21 is electrically connected to the first tab 12. When any one of the first battery protection plate and the first battery body fails, the first connection part 21 and the second connection part 22 can be separated, so that the first battery protection plate 3 and the first battery body 1 can be separated, and the part which does not fail can still be used continuously, thereby reducing the cost.

The embodiment of the present disclosure provides a battery assembly, as shown in fig. 4, including a second battery protection plate 01, a second battery body 02, and a fixing member 03.

Wherein the second battery protection plate 01 has a groove structure 011. The second battery body 02 comprises a second electric core component 021 and a second lug 022, one end of the second lug 022 is connected with the second electric core component 021, and the other end of the second lug 022 is located in a groove structure 011 and is attached to the bottom 0111 of the groove structure 011. The fixing piece 03 is clamped with the groove structure 011, and the fixing piece 03 and the groove bottom 0111 clamp and fix the other end of the second lug 022.

Thus, the fixing member 03 and the groove bottom 0111 can clamp and fix the second electrode lug 022, and the second battery protection plate 01 is connected with the second electrode lug 022 and electrically connected with the second battery body 02. When any one of the second battery protection plate and the second battery body fails, the fixing member 03 can be detached from the groove structure 011, so that the second battery protection plate 01 and the second battery body 02 can be separated, and the part which does not fail can still be used continuously, thereby reducing the cost.

In some possible embodiments, the sidewall of the recess structure 011 has a snap recess 0112.

As shown in fig. 4, the side wall of the fixing member 03 has a clamping protrusion 031, and the clamping protrusion 031 is matched with the clamping groove 0112.

The shape of the clamping protrusion 031 is the same as the shape of the clamping groove 0112.

Like this, through the cooperation between joint protruding 031 and the joint recess 0112, can promote the connection stability of recess structure 011 and mounting 03, and then promote the connection stability between second battery protection shield 01 and the second battery body 02.

In one example, the snap groove 0112 includes a first groove portion 01121 and a second groove portion 01122.

As shown in fig. 5, the first groove part 01121 extends in a first direction, which is a groove depth direction of the groove structure 011, and the second groove part 01122 extends in a second direction on a sidewall of the groove structure 011, which is orthogonal to the first direction.

Wherein, the groove bottom of the first groove part 01121 is parallel to the groove bottom 0111 of the groove structure 011, and the distance between the groove bottom of the first groove part 01121 and the groove bottom 0111 of the groove structure 011 is equal to the thickness of the second lug 022.

In this way, the stability of clamping the second lug 022 between the fixing piece 03 and the groove bottom 0111 of the groove structure 011 can be improved.

In practice, during the process of assembling the second battery protection plate 01 and the second battery body 02, the second tab 022 may be bent so that the second tab 022 is parallel to the bottom of the groove structure 011, then the second tab 022 is moved so that the second tab 022 is attached to the bottom of the groove structure 011, then the clamping protrusion 031 is aligned with the clamping groove 0112, the fixing member 03 is pushed along the first direction so that the clamping protrusion 031 is attached to the bottom of the first groove part 01121, finally, the fixing member 03 is pushed along the second direction so that the clamping protrusion 031 is attached to the bottom of the second groove part 01122, and the second tab 022 is clamped and fixed by the fixing member 03 and the bottom 0111 of the groove structure 011.

Thus, the fixing member 03 and the groove bottom 0111 of the groove structure 011 can clamp and fix the second electrode lug 022, and the second battery protection plate 01 is electrically connected with the second electrode lug 022. When any one of the second battery protection plate and the second battery body fails, the fixing piece 03 can be sequentially moved along the reverse direction of the second direction and the reverse direction of the first direction, and the fixing piece 03 is detached from the groove structure 011, so that the second battery protection plate 01 and the second battery body 02 are separated, and the part which does not fail can still be continuously used, and the cost is reduced.

The embodiment of the present disclosure provides a battery assembly, as shown in fig. 6, including a third battery body 100 and a third battery protection plate 200.

The third battery body 100 includes a third battery cell assembly 110 and a third tab 120. The third battery protection board 200 includes a first circuit board 210 and a second circuit board 220, the first circuit board 210 is attached to the third ear 120, the second circuit board 220 is located at one side of the third ear 120 far away from the first circuit board 210, and is adhered to the first circuit board 210, and the first circuit board 210 and the second circuit board 220 clamp and fix the third ear 120.

In this way, the first circuit board 210 and the second circuit board 220 can clamp and fix the third ear 120, the third battery protection board 200 is connected with the third ear 120, and the third battery module 110 is electrically connected with the third ear 120. When any one of the third battery protection plate and the third battery body fails, the bonding position of the first circuit board 210 and the second circuit board 220 can be heated to separate the first circuit board 210 and the second circuit board 220, so that the third tab 120 is pulled out from the first circuit board 210 and the second circuit board 220 to separate the third battery body 100 and the third battery protection plate 200, and the component which does not fail can still be used continuously, thereby reducing the cost.

Illustratively, the first circuit board 210 and the second circuit board 220 may be bonded by a hot melt adhesive.

In this way, the connection stability between the first circuit board 210 and the second circuit board 220 can be improved.

The embodiment of the present disclosure provides a portable terminal device including the battery assembly of any one of the embodiments.

In some possible embodiments, the portable terminal device further comprises a buffer assembly 4.

As shown in fig. 8, the buffer assembly 4 is connected to the first cell assembly 11 and the first battery protection plate 3, respectively.

Thus, by providing the buffer assembly 4 in the portable terminal device, when the portable terminal device receives an impact load, the buffer assembly 4 can absorb the impact load between the first battery cell assembly 11 and the first battery protection plate 3, thereby improving the connection stability between the first battery cell assembly 11 and the first battery protection plate 3.

In one example, as shown in fig. 9, the buffer assembly 4 includes a housing 41 and a buffer medium 42, the housing 1 has a cavity structure, and two opposite outer wall surfaces of the housing 1 are respectively connected to the first cell assembly 11 and the first battery protection plate 3, and the buffer medium 42 is located in the cavity structure for absorbing an impact load between the first cell assembly 11 and the first battery protection plate 3.

Illustratively, the material of the housing 41 may be silica gel, and the buffer medium 42 may be an insulating gas or an insulating liquid.

The buffer medium 42 may be an inert gas such as helium, neon, or an insulating liquid such as insulating oil, and the type of the buffer medium 42 is not limited in the embodiments of the present disclosure.

Optionally, cushioning assembly 4 also includes a reinforcing plate 43.

As shown in fig. 9, the reinforcing plate 43 is located in the cavity structure and is connected to the inner wall surface of the housing 41.

In this way, the overall strength of the cushioning assembly 4 can be improved, and the cushioning assembly 4 is prevented from breaking under impact load.

The number of the reinforcing plates 43 may be plural, the plurality of reinforcing plates 43 are all located in the cavity structure and connected to the inner wall surface of the housing 41, and the plurality of reinforcing plates 43 may be disposed corresponding to the first cell assembly 11 and the first battery protection plate 3, respectively.

In this way, the plurality of reinforcing plates 43 can support the first cell assembly 11 and the first battery protection plate 3, respectively, and the connection strength between the first cell assembly 11 and the first battery protection plate 3 can be improved.

Alternatively, as shown in fig. 10, the reinforcing plate 43 may be located outside the cavity structure and connected to the outer wall surface of the housing 41.

Thus, the processing difficulty of the buffer assembly 4 can be reduced, and the cost can be reduced.

The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only, and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.

Claims (10)

1. A battery assembly, characterized in that the battery assembly comprises a first battery body (1), a connecting piece (2) and a first battery protection plate (3);

The first battery body (1) comprises a first electric core component (11) and a first tab (12);

The connecting piece (2) comprises a first connecting part (21) and a second connecting part (22), the first connecting part (21) is attached to the first tab (12) and is connected with the second connecting part (22), and the first connecting part (21) and the second connecting part (22) clamp and fix the first tab (12);

The first battery protection plate (3) is connected to the first connection portion (21).

2. The battery assembly according to claim 1, wherein the first connection portion (21) includes a fitting section (211) and a bending section (212);

the attaching section (211) has a plate-shaped structure and is attached to the first tab (12);

One end of the bending section (212) is connected with the attaching section (211);

The second connecting part (22) is positioned at one side of the first tab (12) far away from the attaching section (211) and is connected with the other end of the bending section (212), and the second connecting part (22) and the attaching section (211) are used for clamping and fixing the first tab (12);

The first battery protection plate (3) is located on one side, far away from the second connecting portion (22), of the attaching section (211) and is connected with the attaching section (211).

3. The battery assembly according to claim 2, wherein the second connection portion (22) has a wavy plate-like structure.

4. The battery assembly according to claim 1, wherein the first connection portion (21) has a receiving groove (213), the receiving groove (213) having opposite first and second wall surfaces, the first wall surface being in contact with the first tab (12), the second wall surface having a mounting through hole (214);

The second connecting portion (22) is located in the mounting through hole (214) and is connected with the mounting through hole (214), and the first wall surface and the second connecting portion (22) are clamped and fixed on the first tab (12).

5. The battery assembly of claim 4, wherein the second connection portion (22) is an interference fit with the mounting through hole (214).

6. The battery assembly according to claim 1, wherein the second connecting portion (22) has an annular structure, the second connecting portion (22) is sleeved on an outer ring of a joint portion between the first connecting portion (21) and the first tab (12), and the first connecting portion (21) and an inner ring of the second connecting portion (22) clamp and fix the first tab (12).

7. A battery assembly, characterized in that the battery assembly comprises a second battery protection plate (01), a second battery body (02) and a fixing member (03);

The second battery protection plate (01) has a groove structure (011);

The second battery body (02) comprises a second battery cell assembly (021) and a second lug (022), one end of the second lug (022) is connected with the second battery cell assembly (021), and the other end of the second lug is positioned in the groove structure (011) and is attached to the groove bottom (0111) of the groove structure (011);

the fixing piece (03) is clamped with the groove structure (011), and the fixing piece (03) and the groove bottom (0111) clamp and fix the other end of the second lug (022).

8. The battery assembly according to claim 7, wherein the side wall of the groove structure (011) has a clamping groove (0112), the side wall of the fixing member (03) has a clamping protrusion (031), and the clamping protrusion (031) is matched with the clamping groove (0112);

The clamping groove (0112) comprises a first groove part (01121) and a second groove part (01122), the first groove part (01121) extends in a first direction, the first direction is the groove depth direction of the groove structure (011), the second groove part (01122) extends in a second direction on the side wall of the groove structure (011), and the second direction is orthogonal to the first direction.

9. A battery assembly, characterized in that the battery assembly comprises a third battery body (100) and a third battery protection plate (200);

The third battery body (100) comprises a third electric core assembly (110) and a third lug (120);

the third battery protection board (200) comprises a first circuit board (210) and a second circuit board (220), the first circuit board (210) is attached to the third lug (120), the second circuit board (220) is located on one side, away from the first circuit board (210), of the third lug (120) and is adhered to the first circuit board (210), and the first circuit board (210) and the second circuit board (220) are clamped and fixed on the third lug (120).

10. A portable terminal device, characterized in that the portable terminal device comprises the battery assembly according to any one of claims 1 to 9.