Battery cell assembly and battery

Abstract

The utility model relates to a battery, in particular to a battery cell assembly and a battery, which comprise a glue injection block, a first battery cell and a circuit board, the first battery cell is provided with a first tab and a second tab, the first tab and the second tab penetrate out of the first battery cell from a top seal of the battery cell body, and the first tab and the second tab are welded on the circuit board; the first tab, the second tab and the circuit board are arranged in the glue injection block, so that the glue injection block completely wraps the first tab, the second tab and the circuit board; and the glue injection block is adhered to the top seal of the battery cell body. According to the utility model, the circuit board, the first tab and the second tab are wrapped by the injection molding block, components can be well protected from being damaged in a reliability test, and the tabs cannot shake back and forth and cannot cause fatigue fracture, so that the functional integrity of the battery is ensured.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a core component and a battery. Background Art

[0002] At present, after the positive and negative electrode tabs of a soft-pack battery are connected to a circuit board at the top end of the soft-pack battery, a brown adhesive tape, a PI adhesive tape, a foam, or the like is used to wrap around the circuit board to protect the top seal of the soft-pack battery.

[0003] When performing some reliability tests (such as drop tests, micro-drop tests, drum tests, etc.) on such top-seal protection measures, there will be a large impact on the battery, and the phenomenon of the electrode tabs shaking back and forth will occur, and there is a risk of fatigue fracture of the electrode tabs. Summary of the Utility Model

[0004] An embodiment of the utility model provides a core component and a battery to solve the problem that there will be a large impact on the battery when performing some reliability tests on such top-seal protection measures.

[0005] On the one hand, an embodiment of the utility model provides a core component, including a glue injection block, a first core, and a circuit board;

[0006] The first core includes a core body, a first electrode tab, and a second electrode tab. The first electrode tab and the second electrode tab penetrate out from the top seal of the core body, and the first electrode tab and the second electrode tab are welded to the circuit board;

[0007] The first electrode tab, the second electrode tab, and the circuit board are all placed in the glue injection block, so that the glue injection block completely wraps the first electrode tab, the second electrode tab, and the circuit board; the glue injection block is bonded to the core body.

[0008] Optionally, two connecting pieces are arranged on the circuit board, and slots are arranged on the connecting pieces. The first electrode tab is inserted into the slot of one of the connecting pieces and welded to the connecting piece, and the second electrode tab is inserted into the slot of the other connecting piece and welded to the connecting piece.

[0009] Optionally, the connecting piece includes a connecting piece, a first clamping piece, and a second clamping piece. The first clamping piece is fixed on the circuit board. The opposite sides of the connecting piece are respectively connected to the first clamping piece and the second clamping piece. The first clamping piece and the second clamping piece are parallel and spaced apart, and the space between the first clamping piece and the second clamping piece forms the slot.

[0010] Optionally, it further includes an adhesive layer, which is arranged between the circuit board and the top seal of the core body, and the two sides of the adhesive layer are respectively bonded to the circuit board and the top seal of the core body.

[0011] Optionally, the circuit board and the top seal of the battery cell body are parallel and opposite to each other, and one side wall of the circuit board is opposite to the side wall of the battery cell body; a plurality of electrical components are arranged on one side surface of the circuit board, and the electrical components and the two connecting pieces are both arranged on the side surface of the circuit board close to the top seal of the battery cell body.

[0012] Optionally, it further includes a connecting wire, the connecting wire includes a main wire and at least one branch wire, one end of the main wire is connected to the circuit board, the other end of the main wire passes out of the glue injection block, one end of the branch wire is connected to the end of the main wire passing out of the glue injection block, and the other end of the branch wire is adapted to be connected to an external device.

[0013] Optionally, it further includes an insulating member, the insulating member includes an insulating layer, a protective side piece and a protective layer, the insulating layer is arranged between the circuit board and the top seal of the battery cell body; the protective side piece is arranged between the side wall of the circuit board and the side wall of the battery cell body, a through hole is arranged on the protective side piece, and the through hole is adapted for the main wire to pass through, and the protective layer is arranged on the side of the circuit board away from the top seal of the battery cell body.

[0014] Optionally, the insulating layer, the protective side piece and the protective layer are integrally formed.

[0015] On the other hand, an embodiment of the present invention discloses a battery, which is characterized in that it includes the above-mentioned battery cell assembly.

[0016] On yet another aspect, an embodiment of the present invention discloses a battery, including a second battery cell and the above-mentioned battery cell assembly; the second battery cell and the first battery cell are arranged side by side to form a combination, and the top seals of the battery cell bodies and the top seals of the battery cell main bodies are located on the same side of the combination; the second battery cell has a third tab and a fourth tab, the third tab and the fourth tab pass out of the second battery cell from the top seal of the battery cell main body, the third tab and the fourth tab are welded to the circuit board, and the third tab and the fourth tab are arranged in the glue injection block;

[0017] At least one second battery cell is provided.

[0018] The present invention has the following beneficial effects: by wrapping the circuit board, the first tab and the second tab with an injection molding block, the components on the circuit board can be completely separated from the outside world, playing a good role in preventing short circuits, and can well protect the components from damage during reliability tests, and the tabs will not shake back and forth and will not cause fatigue fracture, thus ensuring the functional integrity of the battery. Description of the Drawings

[0019] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is the overall schematic diagram of the battery cell assembly according to an embodiment of the present utility model;

[0021] Figure 2 is the first exploded view of the battery cell assembly according to an embodiment of the present utility model;

[0022] Figure 3 is the second exploded view of the battery cell assembly according to an embodiment of the present utility model;

[0023] Figure 4 is Figure 3 the enlarged view of part A of

[0024] Figure 5 is the overall schematic diagram of the battery according to an embodiment of the present utility model

[0025] Description of the drawings: 1. First battery cell; 11. First tab; 12. Second tab; 13. Top seal; 2. Glue injection block; 3. Circuit board; 4. Connector; 41. Connection piece; 42. First clip; 43. Second clip; 5. Connection wire; 51. Main wire; 52. Branch wire; 6. Insulating part; 61. Insulating layer; 62. Protective side piece; 63. Protective layer; 7. Second battery cell. Detailed implementation manners

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model more clearly understood, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Referring to Figures 1 to 4 , in one embodiment, the present utility model discloses a battery cell assembly, including a glue injection block 2, a first battery cell 1, and a circuit board 3. The first battery cell 1 is a soft-pack battery cell, and the first battery cell 1 includes a battery cell body, a first tab 11, and a second tab 12. The first tab 11 and the second tab 12 penetrate out from the top seal 13 of the battery cell body, and the first tab 11 and the second tab 12 after penetration are welded to the circuit board 3. In this embodiment, one of the first tab 11 and the second tab 12 is a positive tab, and the other is a negative tab.

[0030] Referring to Figure 1 and Figure 2 , the first tab 11, the second tab 12, and the circuit board 3 are all disposed inside the glue injection block 2, so that the glue injection block 2 completely wraps the first tab 11, the second tab 12, and the circuit board 3; the glue injection block 2 is bonded to the battery cell body.

[0031] In this embodiment, after the tabs are welded to the circuit board 3, the injection glue is injection molded at a low temperature to finally form an injection molded block that completely wraps the first tab 11, the second tab 12, and the circuit board 3. The circuit board 3 is a PCB board or a PCBA board. Due to the existence of the injection molded block, the components on the circuit board 3 can be completely separated from the outside world, playing a good role in preventing short circuits. At the same time, because the top end of the battery cell body is protected by the injection molded block, the components can be well protected from damage during the reliability test, and the tabs will not shake back and forth, and will not cause fatigue fracture, thereby ensuring the functional integrity of the battery cell assembly.

[0032] Referring to Figure 3 and Figure 4 , as an example, two connectors 4 are provided on the circuit board 3. Slots are provided on the connectors 4. The first tab 11 is inserted into the slot of one of the connectors 4 and welded to the connector 4, and the second tab 12 is inserted into the slot of the other connector 4 and welded to the connector 4.

[0033] Referring to Figure 4, specifically, the connecting member 4 includes a connecting piece 41, a first clamping piece 42 and a second clamping piece 43. The opposite sides of the connecting piece 41 are respectively connected to the first clamping piece 42 and the second clamping piece 43. The first clamping piece 42 is fixed on the circuit board 3. The first clamping piece 42 and the second clamping piece 43 are parallel and spaced apart, and the space between the first clamping piece 42 and the second clamping piece 43 forms a slot.

[0034] The slot in this embodiment has openings on three sides, and the first tab 11 can be inserted from any side, which is convenient for assembly. After assembly, the connecting member 4 and the first tab 11 are connected by welding. Since the connecting member 4 needs to be electrically connected to the first tab 11, the connecting member 4 is a metal part capable of conducting electricity. Similarly, the installation method of the second tab 12 is the same as that of the first tab 11, which will not be elaborated here, and the second connecting member 4 is also a metal part capable of conducting electricity.

[0035] Refer to Figure 2 and Figure 3 , as an example, the circuit board 3 and the top seal 13 of the battery cell body are parallel and opposite to each other, and one side wall of the circuit board 3 is opposite to the side wall of the first battery cell 1; a plurality of electrical components are arranged on one side surface of the circuit board 3, and the electrical components and the two connecting members 4 are both arranged on the side surface of the circuit board 3 close to the top seal 13 of the battery cell body.

[0036] As an example, the battery cell assembly further includes a connecting wire 5. The connecting wire 5 includes a main wire 51 and at least one branch wire 52. One end of the main wire 51 is connected to the circuit board 3, and the other end of the main wire 51 passes out of the potting block 2. One end of the branch wire 52 is connected to the end of the main wire 51 that passes out of the potting block 2, and the other end of the branch wire 52 is adapted to be connected to an external device.

[0037] Specifically, in this embodiment, the connecting wire 5 is a flexible flat cable, including a main wire 51 and two branch wires 52. One end of the main wire 51 is connected to the circuit board 3, and the other end of the main wire 51 is respectively connected to the two branch wires 52, that is, the two branch wires 52 converge on the main wire 51, and the ends of the two branch wires 52 far from the main wire 51 are respectively connected to an external device.

[0038] Refer to Figure 3 and Figure 4, as an example, the battery cell assembly further includes an insulating member 6. The insulating member 6 includes an insulating layer 61, a protective side piece 62, and a protective layer 63. The insulating layer 61 is disposed between the circuit board 3 and the top seal 13 of the battery cell body; the protective side piece 62 is disposed between the side wall of the circuit board 3 and the side wall of the first battery cell 1. A perforation is provided on the protective side piece 62, and the perforation is adapted for the main wire 51 to pass through. The protective layer 63 is disposed on a side of the circuit board 3 away from the top seal 13 of the battery cell body. Specifically, in this embodiment, the insulating layer 61, the protective layer 63, and the protective side piece 62 are integrally formed. The insulating member 6 is preferably an insulating adhesive tape and is directly adhered to the circuit board 3. The protective layer 63 is formed by extending and bending the protective side piece 62. The protective layer 63 is perpendicular to the protective side piece 62 and parallel to the insulating layer 61. The insulating adhesive tape can provide insulating protection for the circuit board 3 during assembly. After assembly, since the insulating member 6 wraps the circuit board 3, it can also play a certain protective role.

[0039] As an example, the battery cell assembly further includes an adhesive layer. The adhesive layer is disposed between the circuit board 3 and the top seal 13 of the battery cell body. Both sides of the adhesive layer are adhesively bonded to the circuit board 3 and the top seal 13 of the battery cell body respectively. The adhesive layer is a double-sided tape, which has a low cost and is easy to bond.

[0040] Referring to Figure 1 , in one embodiment, the embodiment of the present utility model discloses a battery, which includes a housing and the above-mentioned battery cell assembly. The battery cell assembly is disposed inside the housing. Briefly, the battery cell assembly can be used as a battery alone.

[0041] Referring to Figure 5 , in one embodiment, the embodiment of the present utility model discloses a battery, which includes a housing, a second battery cell 7, and the above-mentioned battery cell assembly; the second battery cell 7 includes a battery cell main body, a third tab, and a fourth tab. The second battery cell 7 and the first battery cell 1 are arranged side by side to form a combination body. In this embodiment, the second battery cell 7 and the first battery cell 1 are stacked, or can be placed side by side. The top seals 13 of the battery cell bodies and the top seal 13 of the second battery cell 7 are located on the same side of the combination body; the third tab and the fourth tab penetrate out of the top seal 13 of the battery cell main body, and the third tab and the fourth tab after penetration are welded to the circuit board 3. The third tab and the fourth tab are disposed inside the potting block 2; the combination body and the potting block are disposed inside the housing; at least one second battery cell 7 is provided.

[0042] An even number of connection clips are provided on the circuit board 3. The structure of the connection clips is the same as that of the connecting member 4. Every two connection clips form a group, and the number of groups of connection clips corresponds to the number of the second battery cells 7. One of each group of connection clips is used to connect the third tab of the second battery cell 7, and the other of each group of connection clips is used to connect the fourth tab of the second battery cell 7. That is to say, the first battery cell 1 and the second battery cell 7 share one circuit board 3, and the potting block 2 simultaneously wraps the first tab 11 and the second tab 12 of the first battery cell 1, the third tab and the fourth tab of the second battery cell 7, and the circuit board 3.

[0043] In other embodiments, the insulating layer 61 is connected to the protective side piece 62, and the protective side piece 62 is connected to the protective layer 63, and the three are not integrally formed.

[0044] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A battery cell assembly, characterized in that: It includes a glue injection block, a first battery cell and a circuit board; The first battery cell comprises a battery cell body, a first pole tab and a second pole tab, the first pole tab and the second pole tab pass through a top seal of the battery cell body, and the first pole tab and the second pole tab are welded on the circuit board; The first pole tab, the second pole tab and the circuit board are all placed in the glue injection block, so that the glue injection block completely wraps the first pole tab, the second pole tab and the circuit board; the glue injection block is bonded to the battery cell body.

2. The battery cell assembly according to claim 1, characterized in that: Two connectors are provided on the circuit board. The connectors are provided with slots. The first pole tab is inserted into the slot of one of the connectors and welded to the connector. The second pole tab is inserted into the slot of the other connector and welded to the connector.

3. The battery cell assembly according to claim 2, characterized in that: The connecting member includes a connecting piece, a first clip and a second clip, the first clip is fixed on the circuit board, the first clip and the second clip are respectively connected on opposite sides of the connecting piece, the first clip and the second clip are parallel and spaced apart, and the space between the first clip and the second clip constitutes the slot.

4. The battery core assembly according to claim 1, characterized in that: It also includes an adhesive layer, which is arranged between the circuit board and the top seal of the battery body, and the two sides of the adhesive layer are respectively bonded to the circuit board and the top seal of the battery body.

5. The battery cell assembly according to claim 2, characterized in that: The circuit board and the top seal of the battery cell body are parallel and opposite to each other, and one of the side walls of the circuit board is arranged opposite to the side wall of the battery cell body; a plurality of electrical components are arranged on one side surface of the circuit board, and the electrical components and the two connecting parts are all arranged on one side surface of the circuit board close to the top seal of the battery cell body.

6. The battery core assembly according to claim 1, characterized in that: It also includes a connecting line, which includes a main line and at least one branch line, one end of the main line is connected to the circuit board, the other end of the main line passes through the injection block, one end of the branch line is connected to the end of the main line passing through the injection block, and the other end of the branch line is suitable for connecting to an external device.

7. The battery cell assembly according to claim 6, characterized in that: It also includes an insulating part, which includes an insulating layer, a protective side piece and a protective layer, wherein the insulating layer is arranged between the circuit board and the top seal of the battery body; the protective side piece is arranged between the side wall of the circuit board and the side wall of the battery body, and the protective side piece is provided with a perforation, which is suitable for the main line to pass through, and the protective layer is arranged on the side of the circuit board away from the top seal of the battery body.

8. The battery cell assembly according to claim 7, characterized in that: The insulating layer, the protective side sheet and the protective layer are integrally formed.

9. A battery, characterized in that: It comprises a shell and a battery cell assembly according to any one of claims 1 to 8, wherein the battery cell assembly is arranged in the shell.

10. A battery, characterized in that: A battery cell assembly comprising a housing, a second battery cell and the battery cell assembly according to any one of claims 1 to 8; the second battery cell comprises a battery cell body, a third pole lug and a fourth pole lug, the second battery cell and the first battery cell are arranged side by side to form a combination, the top seal of the battery cell body and the top seal of the battery cell body are located on the same side of the combination; the third pole lug and the fourth pole lug pass through the top seal of the battery cell body, the third pole lug and the fourth pole lug are welded to the circuit board, and the third pole lug and the fourth pole lug are arranged in the injection block; The combination and the injection block are arranged in the shell; and at least one second battery core is arranged.

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