Rechargeable steel shell battery cell lithium battery

Abstract

The utility model discloses a rechargeable steel shell battery cell lithium battery, and relates to the field of lithium battery devices. The rechargeable steel shell battery cell lithium battery comprises a battery main body and a battery cell body arranged in the battery main body, a limiting cap is arranged in the battery main body, and a control cap is movably inserted into the end part of the battery main body; the control cap comprises a control panel, a sealant and an electric connection metal piece; the control panel is provided with a control cap, the sealing glue is arranged on one side, facing the battery core body, of the control panel, the sealing glue is poured at the end part of the control cap, the electric connection metal piece is mounted in the sealing glue, the limiting cap is arranged on the battery, the sealing glue is arranged on one side, facing the battery core body, of the control panel with components in the control cap, and the components are completely sealed by glue injection; the control board is not easy to corrode by electrolyte and has strong waterproofness, and meanwhile, the sealant can effectively enhance the heat dissipation of components on the circuit board, so that the service life of the circuit board is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a rechargeable steel-shell lithium battery. Background Art

[0002] Steel-cased lithium-ion batteries refer to lithium-ion batteries that use steel as their outer shell. Steel has much higher physical stability and pressure resistance than aluminum, and after structural optimization, the safety of steel-cased cylindrical lithium-ion batteries has reached a new level, making them widely used.

[0003] The existing steel-cased lithium-ion batteries are prone to leakage when dropped or collided, which can directly corrode and damage the controller, leading to a short circuit. Furthermore, the controller sealed in the steel casing is not easily dissipated.

[0004] The reason for this problem is that the controller on the current steel-shell lithium battery is mainly directly installed inside the steel shell and connected to the battery cell. When the lithium battery falls or collides, the connection line of the battery cell is easily disconnected, resulting in leakage of the battery cell. At this time, the leaked liquid is likely to directly corrode and damage the components on the controller, thereby causing a battery short circuit. In addition, the controller sealed in the steel shell is not easy to dissipate heat during use, which reduces the battery life. In view of the shortcomings of the existing technology, we propose a rechargeable steel-shell lithium battery to solve the above problems. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a rechargeable steel-shell lithium battery, which solves the problem that when a steel-shell lithium battery falls or collides, it is easy for the battery to leak and directly corrode the controller, thereby causing a battery short circuit, and the controller sealed in the steel shell is not easy to dissipate heat.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rechargeable steel-shell lithium battery, comprising a battery body and a battery cell disposed inside the battery body, a limited position cap disposed inside the battery body, and a control cap movably plugged into the end of the battery body;

[0007] The limiting cap is composed of a limiting plastic part; wherein, the limiting plastic part is arranged inside the control cap, and the limiting plastic part is used to provide limiting support for the battery cell.

[0008] The control cap includes a control panel, a sealant and an electrical connection metal piece;

[0009] The sealant is arranged on a side of the control board facing the battery cell, the sealant is potted at the end of the control cap, and the electrical connection metal piece is installed inside the sealant.

[0010] Preferably, the control cap is divided into three categories: single electrode metal piece type A, single electrode pad type B, and single electrode female seat type C. The metal piece on the single electrode metal piece type A can be elastic or rigid.

[0011] Preferably, the battery body includes a battery shell, and the battery shell is sleeved on the outer peripheral wall of the battery core.

[0012] Preferably, the battery housing is a cylindrical iron nickel-plated shell with an open top.

[0013] Preferably, a rolling groove is provided on the outer wall of the battery housing, and a seal is provided at the end of the battery housing, and the seal is installed on the outer wall of the control board.

[0014] Preferably, the limiting cap is installed inside the battery housing, and the control cap is arranged at the end of the battery housing.

[0015] Preferably, the control cap further includes a battery positive cap, and the battery positive cap is fixedly mounted on the top of the control board.

[0016] The utility model discloses a rechargeable steel-shell lithium battery, which has the following beneficial effects: the rechargeable steel-shell lithium battery is provided with a limit cap on the battery, a control board with components in the control cap is provided with sealant on the side facing the battery cell, and the components are completely sealed by injecting the sealant, so that the control board is not easily corroded by the electrolyte and has strong waterproofness, and the probability of short circuit failure due to external environmental factors is reduced. At the same time, the sealant can effectively enhance the heat dissipation of the components on the circuit board, thereby increasing the service life of the circuit board.

[0017] It can provide limited support for the battery cells inside the steel shell, improving the stability of the battery. At the same time, the limit cap can be electrically connected to the battery cells and the control cap respectively, which can avoid damage to the battery cells during battery processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of the battery main body of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the control cap of the utility model;

[0021] Figure 3 It is a structural diagram of the position-limiting cap of the utility model.

[0022] In the figure: 100, battery body; 110, control cap; 1101, battery positive electrode cap; 1102, control board; 1103, sealant; 1104, electrical connection metal parts;

[0023] 11A, single electrode metal part type; 11B, single electrode pad type; 11C, single electrode female seat type;

[0024] 120, limit cap; 1201, limit plastic part;

[0025] 130. Battery cell; 140. Battery casing; 1401. Grooving; 1402. Sealing. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0027] The embodiment of the present application provides a rechargeable steel-shell lithium battery, which solves the problem that when a steel-shell lithium battery falls or collides, it is easy for the battery cell to leak and directly corrode and damage the controller, thereby causing a battery short circuit, and the controller sealed in the steel shell is not easy to dissipate heat.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] The embodiment of the utility model discloses a rechargeable steel shell lithium battery.

[0030] According to the attached Figure 1-3 As shown, a rechargeable steel-shell lithium battery includes a battery body 100 and a battery cell 130 disposed inside the battery body 100. A limit cap 120 is disposed inside the battery body 100, and a control cap 110 is movably inserted at the end of the battery body 100.

[0031] The limiting cap 120 is composed of a limiting plastic part 1201 . The limiting plastic part 1201 is disposed inside the control cap 110 and is used to provide limiting support for the battery cell 130 .

[0032] When the limiting cap 120 is welded, wire, metal strip, flexible board and other materials are mainly used to connect the limiting cap 120 and the battery body 100;

[0033] When the limiting cap 120 is of contact type, a connector, a POGO PIN, a claw spring, a spring or other elastic metal parts are mainly used to electrically connect the metal part 1104 and the battery core 130 .

[0034] The control cap 110 includes a control board 1102, a sealant 1103 and an electrical connection metal part 1104; wherein, the sealant 1103 is arranged on the side of the control board 1102 facing the battery body 130, the sealant 1103 is encapsulated at the end of the control cap 110, and the electrical connection metal part 1104 is installed inside the sealant 1103.

[0035] The control cap 110 is divided into three types: a single-electrode metal piece type 11A, a single-electrode pad type 11B, and a single-electrode female seat type 11C. The metal piece on the single-electrode metal piece type 11A can be elastic or rigid.

[0036] The features of this control cap 110 are: a. The overall appearance is a sealed whole, which can be regarded as a secondary packaged electronic component; b. Only three electrical connections are retained on the outside, namely B+, B-, and P+, and other components are placed in the cavity and covered with sealant 1103; c. High structural strength and high reliability. The sealed structure makes the control board 1102 not easily corroded by the electrolyte and has strong waterproofness, which greatly reduces the probability of short circuit failure caused by external environmental factors; d. Good thermal conductivity. The sealant 1103 with good thermal conductivity can effectively reduce the probability of local high-temperature failure of individual components on the control board 1102; e. Standard appearance and convenient transportation and assembly; f. The components can be silk-screened for easy traceability.

[0037] The control board 1102 is composed of a PCB and control circuit components, and mainly provides functions such as lithium battery charge and discharge protection and discharge voltage regulation.

[0038] Electrical connection metal parts 1104 are primarily composed of metal components such as nickel-plated iron, nickel-plated steel, gold-plated copper, or nickel sheets. These components are connected to control board 1102 by cladding or welding. Control board 1102 is connected to the housing and second cap (contact or welded) through these components, or to an external load (such as the positive electrode cap welded to control board 1102).

[0039] The sealant 1103 is placed on the side of the control board 1102 with the components facing the battery cell 130. After the control board 1102 is mounted, the sealant is injected to completely seal the components. The height is slightly higher than the highest component on the board except for the input and output connectors. The advantage of this is that the components form a whole after the mounting and injection are completed, and are less affected by secondary processing (pressure, dust, foreign matter, etc.). At the same time, it can also effectively prevent the influence of liquid and dust on the control circuit during use; when the battery cell 130 leaks, it can also effectively prevent the electrolyte from corroding the control board 1102 and prevent the circuit from short-circuiting; when a short circuit occurs inside the battery cell 130, it provides an integral pressure platform for pressure transmission; the sealant 1103 uses a glue material with a high thermal conductivity coefficient, which can effectively enhance the heat dissipation of components on the circuit board.

[0040] The sealant 1103 is disposed on a side of the control board 1102 facing the battery cell 130 , the sealant 1103 is encapsulated at the end of the control cap 110 , and the electrical connection metal member 1104 is installed inside the sealant 1103 .

[0041] The battery body 100 includes a battery casing 140 , which is sleeved on the outer wall of the battery cell 130 .

[0042] The battery housing 140 is a cylindrical iron nickel-plated shell with an open top and a bottom with or without a boss, depending on the product.

[0043] The battery housing 140 is the negative electrode, and the battery cell 130 is directly placed in the steel housing and is directly electrically connected to the battery housing 140 through a contact connection.

[0044] A rolling groove 1401 is formed on the outer wall of the battery housing 140 , and a seal 1402 is provided at the end of the battery housing 140 . The seal 1402 is mounted on the outer wall of the control board 1102 .

[0045] The limiting cap 120 is installed inside the battery housing 140 , and the control cap 110 is disposed at an end of the battery housing 140 .

[0046] The control cap 110 further includes a battery positive electrode cap 1101 , which is fixedly mounted on the top of the control board 1102 .

[0047] When the present invention is in use, the battery cell 130 and the limiting cap 120 are first assembled and processed, and the two are installed in the battery shell 140. Then, the limiting cap 120 is electrically connected to the battery cell 130 through its own PCB solder pad or metal parts, and is also electrically connected to the control cap 110 at the same time.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A rechargeable steel-shell lithium battery, comprising a battery body (100) and a battery cell (130) disposed inside the battery body (100), characterized in that: A limiting cap (120) is provided inside the battery body (100), and a control cap (110) is movably plugged into the end of the battery body (100); The position-limiting cap (120) is composed of a position-limiting plastic part (1201); The limiting plastic part (1201) is arranged inside the control cap (110), and the limiting plastic part (1201) is used to provide limiting support for the battery cell (130); The control cap (110) comprises a control board (1102), a sealant (1103) and an electrical connection metal part (1104); The sealant (1103) is arranged on the side of the control board (1102) facing the battery cell (130), the sealant (1103) is encapsulated at the end of the control cap (110), and the electrical connection metal part (1104) is installed inside the sealant (1103).

2. The rechargeable steel-shell lithium battery according to claim 1, characterized in that: The limiting cap (120) is installed inside the battery housing (140), and the control cap (110) is arranged at the end of the battery housing (140).

3. The rechargeable steel-shell lithium battery according to claim 1, characterized in that: The control cap (110) is divided into three types: a single-electrode metal piece type (11A), a single-electrode pad type (11B), and a single-electrode female seat type (11C). The metal piece on the single-electrode metal piece type (11A) can be elastic or rigid.

4. The rechargeable steel-shell lithium battery according to claim 1, characterized in that: The battery body (100) includes a battery shell (140), and the battery shell (140) is sleeved on the outer peripheral wall of the battery core (130).

5. The rechargeable steel-shell lithium battery according to claim 4, characterized in that: The battery housing (140) is a cylindrical iron nickel-plated shell with an open top.

6. The rechargeable steel-shell lithium battery according to claim 5, characterized in that: The outer wall of the battery housing (140) is provided with a rolling groove (1401), and the end of the battery housing (140) is provided with a seal (1402), and the seal (1402) is installed on the outer wall of the control board (1102).

7. The rechargeable steel-shell lithium battery according to claim 3, characterized in that: The control cap (110) further comprises a battery positive electrode cap (1101), and the battery positive electrode cap (1101) is fixedly mounted on the top of the control board (1102).

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