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Secondary battery, and method for manufacturing secondary battery

A secondary battery and electrolyte technology, applied in secondary battery manufacturing, secondary battery, electrode manufacturing, etc., can solve the problem of battery capacity reduction

Active Publication Date: 2013-05-01
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In this way, in the conventional secondary battery, there is a problem that the apparent battery capacity becomes small when a large current is repeatedly discharged in a low temperature environment or a large current is repeatedly charged in a low temperature environment.

Method used

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  • Secondary battery, and method for manufacturing secondary battery
  • Secondary battery, and method for manufacturing secondary battery
  • Secondary battery, and method for manufacturing secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0132] Below, while referring to the appendix Figure 1 Embodiments of the present invention will be described. figure 1 A lithium ion secondary battery (secondary battery) 100 according to Embodiment 1 is shown in FIG. in addition, figure 2 and Figure 11 The wound electrode body 120 constituting the lithium ion secondary battery 100 is shown in FIG. Furthermore, in image 3 and Figure 4 The positive electrode plate 121 constituting the wound electrode body 120 is shown in FIG. Figure 5 and Image 6 The negative plate 131 is shown in the Figure 7 and Figure 8 Separator 141 is shown in . In addition, in Figure 9 and Figure 10 A state in which the positive electrode plate 121 and the negative electrode plate 131 are overlapped with each other with the separator 141 interposed therebetween is shown in FIG. In addition, in Figure 12 Details of the case cover member 113 , the positive electrode terminal member 150 , the negative electrode terminal member 160 ,...

Embodiment approach 2

[0209] Then, while referring to Figure 13 to Figure 21 , the second embodiment will be described. In the lithium ion secondary battery (secondary battery) 200 of the second embodiment, the configuration of the electrolyte solution flow suppressing member (one end electrolyte solution flow suppressing member 290 and the other end electrolyte solution flow suppressing member 295 ) and the formation method thereof are the same as those described above. The lithium ion secondary battery 100 according to Embodiment 1 differs in the electrolyte flow suppressing members (one end electrolyte solution flow suppressing member 190 and the other end electrolyte solution flow suppressing member 195 ). Others are the same as the above-mentioned first embodiment, and therefore the description of the same parts as those of the above-mentioned first embodiment is omitted or simplified.

[0210] The wound electrode body 220 according to the second embodiment is a long positive electrode plate...

Embodiment approach 3

[0231] Next, the third embodiment will be described. The vehicle 700 according to the third embodiment is a vehicle in which a plurality of lithium ion secondary batteries 100 according to the first embodiment are mounted, such as Figure 22 As shown, it is a hybrid vehicle that uses an engine 740, a front electric motor 720, and a rear electric motor 730 for driving.

[0232] Specifically, the vehicle 700 includes a body 790 , an engine 740 , a front electric motor 720 attached to the engine, a rear electric motor 730 , a cable 750 , and an inverter 760 . Furthermore, the vehicle 700 includes a battery pack 710 having a plurality of lithium-ion secondary batteries 100 inside itself, and the electric energy stored in the battery pack 710 is used to drive the front electric motor 726 and the rear electric motor 730 .

[0233] As described above, even when the lithium ion secondary battery 100 is repeatedly discharged or charged with a large current in a low-temperature environ...

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Abstract

The purpose of the present invention is to provide a secondary battery capable of preventing the apparent battery capacity from being decreased by the repetition of large-current discharge or charge in a low-temperature environment. This lithium ion secondary battery (secondary battery) (100) is provided with a wound electrode body (120) formed by a positive plate (121) and a negative plate (131) overlapping each other with a separator (141) therebetween and being wound around an axis (AX). The wound electrode body (120) comprises a one end solution flow suppression member (190) which is formed in an axial one end section (120fa) of the electrode body central portion (120f) thereof and suppresses the flow of an electrolytic solution through the axial one end section (120fa), and an other end solution flow suppression member (195) which is formed in an axial other end section (120fb) of the electrode body central portion (120f) and suppresses the flow of the electrolytic solution through the axial other end section (120fb).

Description

technical field [0001] The present invention relates to a secondary battery including a wound electrode body in which an elongated positive electrode plate and an elongated negative electrode plate are overlapped with each other with an elongated separator interposed therebetween, and are wound around an axis. Moreover, it relates to the manufacturing method of this secondary battery. Background technique [0002] Conventionally, a lithium ion secondary battery or the like is known that includes a wound electrode body in which a long positive electrode plate and a long negative electrode plate are overlapped with each other with a long separator interposed therebetween and wound around an axis. secondary battery. The positive electrode plate is composed of an elongated positive electrode current collector foil and a positive electrode active material layer formed thereon, and includes: a strip-shaped positive electrode portion extending in the longitudinal direction; A str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01M10/0566H01M10/0587H01M4/02H01M4/04H01M4/13H01M4/139
CPCY02E60/12H01M10/0587H01M10/049Y02T10/7011H01M10/0431H01M10/0566H01M2300/0085H01M10/052H01M10/0565H01M2/38H01M10/4214Y10T29/49108Y02E60/10Y02P70/50H01M50/70
Inventor 黑田明
Owner TOYOTA JIDOSHA KK