Rechargeable lithium battery with soft package battery core

Abstract

The utility model discloses a rechargeable soft package battery cell lithium battery, and relates to the field of battery cell lithium battery devices. The rechargeable soft package battery cell lithium battery comprises a battery main body, and the battery main body comprises a battery cell body and a battery shell; a limiting cap is mounted in the battery shell; a control cap is mounted at a top opening of the battery shell; a battery cell positive pole lug, a battery cell negative pole lug and a battery cell negative pole and shell adapter are arranged on the battery cell body. According to the rechargeable lithium battery with the soft package battery core, the soft package battery core body and the limiting cover cap are provided with the electric connection adapters, and the control cover cap is provided with the electric connection metal piece, so that the negative electrode lug of the battery core can be directly welded or in contact connection with the shell; and the negative electrode lug of the battery cell can be connected with the battery shell in a contact manner after being welded with the electric connection adapter, so that different processing connections can be conveniently performed on the battery according to the current demand.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric core lithium battery, concretely is a kind of rechargeable soft package electric core lithium battery. BACKGROUND

[0002] Soft package lithium battery is another name of polymer lithium battery, "soft package" in soft package lithium battery, actually refers to a layer of polymer shell on lithium battery, mainly adopts aluminum plastic film packaging, and the rest lithium battery positive pole, negative pole, electrolyte, diaphragm and other battery materials are similar, with the advantages of high energy density, light weight, form self-determination etc.

[0003] The current soft package lithium battery on the current soft package lithium battery is single, in order to reduce the battery tab in the cycle process to cause battery bulging expansion, thereby the current type of soft package lithium battery is limited, not suitable for different current product problems;

[0004] And the reason for this problem is that the current soft package lithium battery is usually packaged by heat sealing during processing, and the metal shell core is generally processed by welding, and the battery tab on the soft package core is usually directly connected with the shell, since the current soft package lithium battery is limited in current type, the flow of battery is small, not suitable for different current products, and the applicability is low, in view of the deficiencies of prior art, a rechargeable soft package electric core lithium battery is provided to solve the above problems. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a rechargeable soft package electric core lithium battery, which solves the single connection of the soft package lithium battery on the current soft package lithium battery, in order to reduce the battery tab in the cycle process to cause battery bulging expansion, thereby the current type of soft package lithium battery is limited, not suitable for different current product problems.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme: a rechargeable soft package electric core lithium battery, including battery main body, the battery main body includes electric core body and battery shell;

[0007] The inside of the battery shell is provided with a limiting cap, and the limiting cap comprises an electric connection adapter;

[0008] The top opening of the battery shell is provided with a control cap, and the control cap comprises an electric connection metal piece;

[0009] The electric core body is provided with an electric core positive tab, an electric core negative tab and an electric core negative and shell adapter.

[0010] Preferably, when the positive electrode tab and the negative electrode tab of the battery cell are both provided with the electric connection adapter, the positive electrode tab is connected with the electric connection adapter, and the negative electrode tab is connected with the battery shell through the negative electrode and the shell adapter.

[0011] Preferably, when the positive electrode tab and the negative electrode tab of the battery cell are both provided with the electric connection adapter, the positive electrode tab is connected with the electric connection adapter, and the negative electrode tab is connected with the battery shell through the negative electrode and the shell adapter.

[0012] Preferably, when the positive electrode tab of the battery cell is provided with the electric connection adapter, the positive electrode tab is connected with the electric connection adapter, and the negative electrode tab is directly connected with the battery shell.

[0013] Preferably, when the battery cell body is not provided with the electric connection adapter, the positive electrode tab is connected with the electric connection metal piece, and the negative electrode tab is connected with the battery shell.

[0014] Preferably, the limiting cap further comprises a limiting plastic piece.

[0015] The limiting plastic piece is arranged in the interior of the control cap, and the electric connection adapter is arranged at the bottom of the limiting plastic piece.

[0016] Preferably, the control cap further comprises a battery positive cap, a control board and sealing glue.

[0017] The battery positive cap is fixedly arranged at the top of the control board, the sealing glue is arranged on the side of the control board facing the battery cell body, the sealing glue is filled in the end of the control cap, and the electric connection metal piece is arranged in the interior of the sealing glue.

[0018] Preferably, the outer peripheral wall of the battery shell is provided with a rolling groove, and the top of the battery shell is provided with a sealing cover.

[0019] The utility model discloses a kind of rechargeable soft package battery cell, and it has the beneficial effects as follows: the rechargeable soft package battery cell, by setting electric connection adapter on soft package battery cell body and limiting cap, setting electric connection metal piece on control cap, negative electrode tab of battery cell can be directly welded or contact type connection with shell;It can also be welded after negative electrode tab of battery cell and electric connection adapter are welded, then contact type connection with battery shell, while electric connection adapter can be welded and connected with shell by laser penetration welding mode when necessary, different processing connections can be carried out on battery according to current demand. DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 It is a first structure schematic view of the utility model positive and negative electrode of electric core all take electric connection adapter;

[0022] Figure 2 It is a second structure schematic view of the utility model positive and negative electrode of electric core all take electric connection adapter;

[0023] Figure 3 It is a structure schematic view of the utility model positive electrode of electric core takes electric connection adapter;

[0024] Figure 4 It is a structure schematic view of the utility model electric core without electric connection adapter;

[0025] Figure 5 It is a structure schematic view of the utility model limiting cap;

[0026] Figure 6 It is a structure schematic view of the utility model control cap.

[0027] In the drawing: 100, battery main body;110, control cap;1101, battery positive cap;1102, control board;1103, sealing glue;1104, electric connection metal piece;

[0028] 11A, single electrode metal piece type;11B, single electrode pad type;11C, single electrode female seat type;

[0029] 120, limiting cap;1201, limiting plastic piece;1202, electric connection adapter;

[0030] 12A, first structure type;12B, second structure type;12C, third structure type;

[0031] 130, electric core body;1301, electric core positive lug;1302, electric core negative lug;1303, electric core negative and shell adapter;

[0032] 140, battery shell;1401, rolling groove;1402, seal. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model is described clearly and completely, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0034] The application provides a rechargeable soft package battery cell lithium battery, which solves the single connection of the soft package battery cell on the current soft package lithium battery, so as to reduce the situation that the battery tab causes the battery to swell in the cycle process, thereby limiting the current type of the produced soft package lithium battery, and the problem that the soft package lithium battery is not suitable for different current products.

[0035] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings of the specification and specific embodiments.

[0036] The utility model discloses a rechargeable soft package battery cell lithium battery.

[0037] According to the accompanying Figures 1-6 As shown in the figure, a rechargeable soft package battery cell lithium battery, including battery main body 100, battery main body 100 includes the core body 130 and battery shell 140, the inside installation of battery shell 140 is limited to cover 120, and the limited cover 120 includes electric connection adapter 1202, and the top opening of battery shell 140 is installed with control cover 110, and the control cover 110 includes electric connection metal piece 1104.

[0038] The core body 130 is provided with a positive electrode tab 1301, a negative electrode tab 1302 and a negative electrode and shell adapter 1303.

[0039] When the core body 130 is a soft package battery cell, the negative electrode tab 1302 can be directly welded or contact connected with the battery shell 140, or the negative electrode tab 1302 is welded with the negative electrode and shell adapter 1303, and then contact connected with the battery shell 140, and the negative electrode and shell adapter 1303 can be welded and connected with the shell by laser penetration welding when necessary (such as large current requirement).

[0040] The limited cover 120 further includes a limited plastic part 1201.

[0041] The limited plastic part 1201 is arranged in the inside of the control cover 110, and the electric connection adapter 1202 is arranged at the bottom of the limited plastic part 1201.

[0042] The limited cover 120 is divided into a first structure 12A, a second structure 12B and a third structure 12C.

[0043] The first structure 12A is composed of plastic parts, and has no electrical connection function and mainly serves as a limiting support;

[0044] The second structure 12B is composed of plastic and metal sheet (filling part), and provides limiting and electrical connection functions, and is mainly suitable for soft package battery cells and contact type electrical connection with the controller;

[0045] The third structure 12C is composed of plastic and metal sheet with guide needle, and provides limiting and electrical connection functions, and is mainly suitable for soft package battery cells and male-female connection with the controller.

[0046] When the limiting cap 120 adopts a welding method, a wire, a metal strip, a flexible plate and the like are mainly used to connect the limiting cap 120 and the battery main body 100;

[0047] When the limiting cap 120 adopts a contact type, a connector, a POGOPIN, a claw spring, a spring or other elastic metal parts are mainly used to electrically connect the metal part 1104 and the cell body 130.

[0048] The control cap 110 further includes a battery positive cap 1101, a control board 1102 and a sealing glue 1103.

[0049] The battery positive cap 1101 is fixedly installed at the top of the control board 1102, the sealing glue 1103 is arranged on the side of the control board 1102 facing the cell body 130, the sealing glue 1103 is filled in the end of the control cap 110, and the electrical connection metal part 1104 is installed in the inside of the sealing glue 1103.

[0050] The control cap 110 is divided into three types of single electrode metal part type 11A, single electrode pad type 11B and single electrode female seat type 11C, wherein the metal part on the single electrode metal part type 11A can be elastic or rigid.

[0051] The control cap 110 has the following characteristics: a. The overall appearance is a sealed whole, which can be regarded as a secondary packaged electronic component; b. Only three electrical connections are reserved on the outside, which are B+, B- and P+, other components are arranged in the cavity and covered with the sealing glue 1103; c. The structural strength is high, the reliability is high, the sealing structure makes the control board 1102 not easy to be corroded by electrolyte and has strong waterproofness, which greatly reduces the probability of short circuit failure of the circuit caused by external environmental factors; d. Good heat conduction, the sealing glue 1103 with good heat conductivity can effectively reduce the probability of local high temperature failure of individual components on the control board 1102; e. The shape is standard and convenient for transportation and assembly; f. The components can be silk-screen printed, which is convenient for tracing.

[0052] The control board 1102 is composed of a PCB and control circuit components, and mainly provides functions of lithium battery charge and discharge protection and discharge voltage adjustment.

[0053] The electric connection metal piece 1104 is mainly composed of metal components such as iron plated with nickel, steel plated with nickel, copper plated with gold, or nickel sheet, which are connected with the control plate 1102 by cladding or welding. The control plate 1102 is connected (contact or welding) with the shell and the second cap through the components, or connected with the external load through the components (such as the positive cap welded on the control plate 1102).

[0054] The sealing glue 1103 is arranged on the side of the control plate 1102 with components facing the battery core 130, and the components are completely sealed after the control plate 1102 is completed by patching and glue injection, and the height is slightly higher than the highest component on the plate except the input and output connecting piece. The advantage of this is that the components form a whole after patching and glue injection, and the influence on secondary processing (pressure, dust, foreign matter, etc.) is small, and at the same time, the influence of liquid and dust on the control circuit in use can be effectively avoided; when the battery core 130 leaks, the electrolyte can also effectively prevent the control plate 1102 from being eroded, preventing the circuit from short-circuiting; when the internal short circuit of the battery core 130 occurs, a whole pressure platform is provided for pressure transmission; the sealing glue 1103 adopts a glue material with high thermal conductivity, which can effectively enhance the heat dissipation of the components on the circuit board

[0055] The outer peripheral wall of the battery shell 140 is provided with a rolling groove 1401, and the top of the battery shell 140 is provided with a sealing cover 1402, which is installed on the top of the control plate 1102.

[0056] The battery shell 140 is a cylindrical iron plated with nickel, and the top is open, and the bottom is provided with a boss or not, which is determined according to the product.

[0057] In use, the battery core 130 and the limiting cap 120 are assembled and processed first, and then the two are installed in the battery shell 140, and then the limiting cap 120 is electrically connected with the battery core 130 through the soldering pad or metal piece of the PCB itself, and is also electrically connected with the control cap 110.

[0058] Embodiment one,

[0059] When the positive electrode tab 1301 and the negative electrode tab 1302 of the battery core are provided with electric connection switching parts, the positive electrode tab 1301 of the battery core is connected with the electric connection switching part 1202, and the negative electrode tab 1302 of the battery core is connected with the battery shell 140 through the negative electrode switching part 1303 of the shell, as shown in the schematic view. Figure 1 Schematic view.

[0060] Embodiment two,

[0061] When the positive electrode tab 1301 and the negative electrode tab 1302 of the battery cell are connected with the electric connection adapter, the positive electrode tab 1301 of the battery cell is connected with the electric connection metal piece 1104, and the negative electrode tab 1302 of the battery cell is connected with the battery shell 140 through the negative electrode of the battery cell and the shell adapter 1303, as shown in Figure 2 schematic view.

[0062] Embodiment three,

[0063] When the positive electrode tab 1301 of the battery cell is connected with the electric connection adapter, the positive electrode tab 1301 of the battery cell is connected with the electric connection adapter 1202, and the negative electrode tab 1302 of the battery cell is directly connected with the battery shell 140, as shown in Figure 3 schematic view.

[0064] Embodiment four,

[0065] When the battery cell body 130 is not connected with the electric connection adapter, the positive electrode tab 1301 of the battery cell is connected with the electric connection metal piece 1104, and the negative electrode tab 1302 of the battery cell is connected with the battery shell 140, as shown in Figure 4 schematic view.

[0066] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by the person skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, and the utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rechargeable soft-pack battery cell, comprising a battery body (100), the battery body (100) comprising a cell body (130) and a battery shell (140); characterized in that A limiting cap (120) is mounted inside the battery shell (140), and the limiting cap (120) comprises an electrical connection adapter (1202); A control cap (110) is mounted at the top opening of the battery shell (140), and the control cap (110) comprises an electrical connection metal piece (1104); The cell body (130) is provided with a cell positive tab (1301), a cell negative tab (1302), and a cell negative shell adapter (1303).

2. The rechargeable soft-pack battery of claim 1, wherein: The cell positive tab (1301) and the cell negative tab (1302) are both provided with electrical connection adapter parts, the cell positive tab (1301) is connected with the electrical connection adapter (1202), and the cell negative tab (1302) is connected with the battery shell (140) through the cell negative shell adapter (1303).

3. The rechargeable soft-pack battery of claim 1, wherein: The cell positive tab (1301) and the cell negative tab (1302) are both provided with electrical connection adapter parts, the cell positive tab (1301) is connected with the electrical connection metal piece (1104), and the cell negative tab (1302) is connected with the battery shell (140) through the cell negative shell adapter (1303).

4. The rechargeable soft-pack battery of claim 1, wherein: The cell positive tab (1301) is provided with an electrical connection adapter part, the cell positive tab (1301) is connected with the electrical connection adapter (1202), and the cell negative tab (1302) is directly connected with the battery shell (140).

5. The rechargeable soft-pack battery of claim 1, wherein: The cell body (130) is not provided with an electrical connection adapter part, the cell positive tab (1301) is connected with the electrical connection metal piece (1104), and the cell negative tab (1302) is connected with the battery shell (140).

6. The rechargeable soft-pack battery of claim 1, wherein: The limiting cap (120) further comprises a limiting plastic piece (1201); The limiting plastic piece (1201) is arranged inside the control cap (110), and the electrical connection adapter (1202) is arranged at the bottom of the limiting plastic piece (1201).

7. The rechargeable soft-pack lithium battery of claim 1, wherein: The control cap (110) further comprises a battery positive cap (1101), a control board (1102), and a sealing glue (1103); The battery positive cap (1101) is fixedly mounted at the top of the control board (1102), the sealing glue (1103) is arranged on the side of the control board (1102) facing the cell body (130), the sealing glue (1103) is filled in the end of the control cap (110), and the electrical connection metal piece (1104) is mounted inside the sealing glue (1103).

8. The rechargeable soft-pack lithium battery of claim 1, wherein: The battery shell (140) is provided with a rolling groove (1401) on the outer peripheral wall, and the battery shell (140) is provided with a sealing cover (1402) at the top, and the sealing cover (1402) is mounted at the top of the control board (1102).

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