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Battery controller and rechargeable battery

A technology for battery controllers and rechargeable batteries, which is applied to secondary batteries, electrochemical generators, battery pack components, etc., and can solve problems such as large controller size, battery overheating, and explosion

Pending Publication Date: 2020-10-23
SHENZHEN MAIGESONG ELECTRICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this approach will reduce the function of the battery and potential safety risks, causing the battery to overheat and even explode
Integrating various functional circuits in the controller will result in complex structure of the control circuit and large size of the controller.

Method used

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  • Battery controller and rechargeable battery
  • Battery controller and rechargeable battery
  • Battery controller and rechargeable battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] Example 1, N-type No. 5 steel case lithium ion secondary battery.

[0169] refer to figure 1 with figure 2 , the battery 100a mainly includes: a battery cell 200a and a controller 400a. The cell 200a has a cylindrical shape and has a cell positive electrode 230a and a cell negative electrode 220a. The controller 400a is coaxially stacked on the end where the positive electrode 230a of the cell is located and packaged with the No. 5 steel-cased cell 200a as a whole.

[0170] The battery cell 200a shown in this embodiment is a CID battery cell, that is, a battery cell with a current cut-off protection structure. When the battery cell fails (such as overheating, short circuit, overcharging, etc.), a lot of gas will be generated inside, and when the pressure increases, The inside of the battery cell will automatically break the circuit and play a protective role.

[0171] The shell of the battery cell 200a is a steel shell, and the internal structure of the battery cel...

Embodiment 2

[0246] Embodiment 2, N-type No. 5 soft-pack lithium-ion secondary battery.

[0247] Figure 14 to Figure 20 It is the structure diagram of N-type No. 5 soft-pack lithium-ion secondary battery and its controller.

[0248] refer to Figure 14 with Figure 15 , the battery 100b includes a battery outer shell 110b, a cell 200b and a controller 400b.

[0249] The battery cell 200b in this embodiment is a soft-packed lithium-ion battery cell. Like the above-mentioned embodiment, it is also in a cylindrical shape and has a positive electrode 230b and a negative electrode 220b.

[0250] The battery case 110b is a cylindrical structure with one end open and the other end closed. The positive electrode 230b of the cell is a positive electrode sheet, and the negative electrode 220b of the cell is a negative electrode sheet.

[0251] The positive electrode 230b of the battery cell is a lug structure with a certain length. After the negative electrode 220b of the battery cell is exten...

Embodiment 3

[0261] Example 3, N-type No. 7 steel case lithium ion secondary battery.

[0262] Figure 21 to Figure 27 It is the structural diagram of the N-type No. 7 steel case lithium-ion secondary battery and its controller.

[0263] The secondary battery structure of this embodiment is similar to that of Embodiment 1. The difference is that Embodiment 1 is the No. 5 battery, and this embodiment is the No. 7 battery. Since the diameter of the No. 7 battery is smaller than that of the No. 5 battery, the There will be slight differences in design, mainly manifested in: the movable end of the inner electrode 330c of the controller 400c of the No. 7 steel shell lithium-ion secondary battery in this embodiment is circular, and the shape of the electrode cap pad 310c is different.

[0264] refer to Figure 21 , the battery 100c includes: a battery cell 200c and a controller 400c.

[0265] The battery cell 200c of this embodiment is a steel-cased lithium-ion battery cell, which is also in ...

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Abstract

The invention relates to a battery controller and a rechargeable battery, the rechargeable battery comprises a battery cell and a controller, and the controller comprises a circuit board and an innerelectrode. The circuit board comprises a first surface and a second surface which are opposite to each other, and a circuit component is welded on the second surface; the inner electrode is made of aconductive metal material; one end of the inner electrode is fixed and electrically connected with the circuit board; an inner electrode fixing part is formed; the other end of the inner electrode isa movable end which is not connected with the circuit board; the movable end is an inner electrode cell welding table for fixing and electrically connecting a cell, the inner electrode cell welding table is formed by integrally extending and bending the inner electrode fixing part, and an accommodating space for arranging circuit components is formed between the bent inner electrode cell welding table and the circuit board. According to the controller, the axial height of the controller is reduced by optimizing the structure of the controller, so that the absolute storage energy and the volumetric specific energy of the rechargeable battery are improved.

Description

technical field [0001] The invention relates to the technical field of rechargeable batteries, in particular to a rechargeable battery and a controller applied to the rechargeable battery. Background technique [0002] The cylindrical primary battery standardized by GB / T 8897.2 (IEC 60086-2) has been widely used in the field of hand-held or portable electronic and electrical products. Since primary batteries are not reusable, and there are problems such as high battery cost and environmental pollution caused by discarded batteries, the demand for secondary battery products that can replace GB / T 8897.2 (IEC60086-2) standardized primary batteries is increasing in the consumer market. [0003] With the rapid development of lithium-ion battery charge and discharge control technology, the control circuit, DC-DC converter circuit and lithium-ion battery are packaged as one, and the control circuit controls the charge and discharge of the lithium-ion battery, and then the DC-DC con...

Claims

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Application Information

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IPC IPC(8): H01M10/42H01M2/20H01M10/0525
CPCH01M10/425H01M10/0525Y02E60/10
Inventor 李松邓爱雯邓建坤
Owner SHENZHEN MAIGESONG ELECTRICAL TECH CO LTD
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