{"id":2646,"date":"2026-04-29T16:09:12","date_gmt":"2026-04-29T08:09:12","guid":{"rendered":"https:\/\/www.bosaenergy.cn\/?p=2646"},"modified":"2026-04-29T16:09:15","modified_gmt":"2026-04-29T08:09:15","slug":"pourquoi-les-courbes-de-charge-et-de-decharge-des-batteries-au-lithium-ne-coincident-elles-pas-cela-est-du-a-leffet-dhysteresis","status":"publish","type":"post","link":"https:\/\/www.bosaenergy.cn\/fr\/why-do-the-charging-and-discharging-curves-of-lithium-batteries-not-coincide-this-is-due-to-the-hysteresis-effect\/","title":{"rendered":"Pourquoi les courbes de charge et de d\u00e9charge des batteries au lithium ne co\u00efncident-elles pas\u00a0? Cela est d\u00fb \u00e0 l\u2019effet d\u2019hyst\u00e9r\u00e9sis."},"content":{"rendered":"<h3 class=\"wp-block-heading\" id=\"ember1766\">1. Qu&#039;est-ce que l&#039;hyst\u00e9r\u00e9sis de tension ?<\/h3>\n\n\n\n<p id=\"ember1767\">L&#039;hyst\u00e9r\u00e9sis de tension d\u00e9signe le ph\u00e9nom\u00e8ne par lequel les courbes d&#039;\u00e9volution du potentiel des \u00e9lectrodes en fonction de la capacit\u00e9 ne co\u00efncident pas lors des cycles de charge et de d\u00e9charge, formant ainsi une boucle d&#039;hyst\u00e9r\u00e9sis. Cette hyst\u00e9r\u00e9sis entra\u00eene une dissipation d&#039;\u00e9nergie et une r\u00e9duction du rendement de charge\/d\u00e9charge des batteries lithium-ion.<\/p>\n\n\n\n<p id=\"ember1768\">Le point d&#039;\u00e9quilibre de la courbe de charge est inf\u00e9rieur \u00e0 la tension aux bornes, tandis que celui de la courbe de d\u00e9charge est sup\u00e9rieur. Ce ph\u00e9nom\u00e8ne s&#039;explique principalement par les processus de charge, de d\u00e9charge et de transfert de masse de la double couche.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\"><img decoding=\"async\" src=\"https:\/\/media.licdn.com\/dms\/image\/v2\/D5612AQGGDyWCyZr44Q\/article-inline_image-shrink_400_744\/B56Z3YLsA6IIAY-\/0\/1777448436779?e=1779321600&amp;v=beta&amp;t=iFxmjg9yclX_VHEBLkXgHGWCq9JNQIxWdNrczcnlj5I\" alt=\"\u6587\u7ae0\u5185\u5bb9\"\/><figcaption class=\"wp-element-caption\">Remarque : La charge et la d\u00e9charge au sein du SoC 20%-50% g\u00e9n\u00e8rent un circuit d&#039;hyst\u00e9r\u00e9sis secondaire.<\/figcaption><\/figure>\n\n\n\n<p id=\"ember1770\">Un cycle complet de charge-d\u00e9charge (charge et d\u00e9charge compl\u00e8tes) de la batterie produit la boucle d&#039;hyst\u00e9r\u00e9sis primaire\u00a0; un cycle incomplet (charge et d\u00e9charge partielles) produit la boucle d&#039;hyst\u00e9r\u00e9sis secondaire. Les deux courbes constituant la boucle d&#039;hyst\u00e9r\u00e9sis primaire sont les courbes limites de toutes les boucles d&#039;hyst\u00e9r\u00e9sis, formant ainsi la plus grande boucle ferm\u00e9e. Les courbes de charge-d\u00e9charge de la boucle d&#039;hyst\u00e9r\u00e9sis secondaire se situent \u00e0 l&#039;int\u00e9rieur des courbes limites et tendent \u00e0 converger vers celles-ci.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter\"><img decoding=\"async\" src=\"https:\/\/media.licdn.com\/dms\/image\/v2\/D5612AQH0QjelppisoQ\/article-inline_image-shrink_1000_1488\/B56Z3YM_NHKEAQ-\/0\/1777448777955?e=1779321600&amp;v=beta&amp;t=VGie69QLRGw0S0Y2xT167C3EJxC62IfCBRizjHFgpas\" alt=\"\u6587\u7ae0\u5185\u5bb9\"\/><figcaption class=\"wp-element-caption\">Remarque : Le circuit d&#039;hyst\u00e9r\u00e9sis principal est obtenu par charge et d\u00e9charge dans la plage de SOC 0%-100%<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember1772\">2. Causes de l&#039;hyst\u00e9r\u00e9sis de tension dans les batteries lithium-ion<\/h3>\n\n\n\n<p id=\"ember1773\">Les principales causes de l&#039;hyst\u00e9r\u00e9sis de tension dans les batteries lithium-ion sont l&#039;effet entropique, les contraintes m\u00e9caniques et les distorsions microscopiques au sein du mat\u00e9riau de l&#039;\u00e9lectrode active lors de l&#039;insertion et de l&#039;extraction du lithium. La lithiation et la d\u00e9lithiation pr\u00e9sentent des constantes de r\u00e9seau diff\u00e9rentes, g\u00e9n\u00e9rant des contraintes m\u00e9caniques au niveau de la barri\u00e8re de phase et provoquant ainsi une chute de potentiel au sein d&#039;une particule lors de la charge et de la d\u00e9charge.<\/p>\n\n\n\n<p id=\"ember1774\">Les effets thermodynamiques sont \u00e9galement un facteur qu&#039;il ne faut pas n\u00e9gliger.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ember1775\">3. Quels aspects sont affect\u00e9s par l&#039;effet d&#039;hyst\u00e9r\u00e9sis ?<\/h3>\n\n\n\n<p id=\"ember1776\">Selon le principe de l&#039;effet de relaxation, la tension apr\u00e8s charge et d\u00e9charge devrait converger vers la valeur r\u00e9elle de la tension en circuit ouvert (OCV) \u00e0 ce niveau de charge (SOC). Cependant, en raison de l&#039;hyst\u00e9r\u00e9sis, la tension apr\u00e8s d\u00e9charge tend toujours vers une valeur inf\u00e9rieure \u00e0 l&#039;OCV r\u00e9elle, tandis que la tension apr\u00e8s charge tend vers une valeur sup\u00e9rieure. Ceci introduit une erreur significative dans la mesure et le calcul de la tension de polarisation, affectant ainsi la pr\u00e9diction de la tension et de la puissance de la batterie.<\/p>","protected":false},"excerpt":{"rendered":"<p>1. What is voltage hysteresis? Voltage hysteresis refers to the phenomenon where the electrode potential evolution curves with capacity do not coincide during the charging-discharging process, thus forming a voltage hysteresis loop. Voltage hysteresis leads to energy dissipation and reduced charging\/discharging efficiency during lithium-ion battery charging and discharging. The equilibrium point of the charging curve [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2647,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[125],"tags":[],"class_list":["post-2646","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-zh"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why do the charging and discharging curves of lithium batteries not coincide? 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