Pole structure and large capacity battery

Abstract

The embodiment of the application discloses a pole structure and a battery, relates to the technical field of battery elements, and can solve the problems of low performance, service life, and safety and reliability of a system of a battery. The pole structure comprises a pole body, a terminal post connected with the pole body, and a heat conduction unit. At least one through hole is arranged on the terminal post. The heat conduction unit is connected with the pole body through the at least one through hole, and the heat conduction unit is attached to the inner wall of each through hole.

Description

Technical Field

[0001] This application relates to the field of battery element technology, and in particular to an electrode structure and a high-capacity battery. Background Technology

[0002] Currently, battery cooling structures primarily target power battery boxes and battery pack systems, mostly employing air cooling or liquid cooling structures. Air cooling is simple, low-cost, and widely used. However, it suffers from low heat exchange efficiency, uneven heat dissipation, and is prone to dust blockage of air ducts. Liquid cooling, on the other hand, offers high heat exchange efficiency, meeting the cooling requirements of batteries during high-rate charging and discharging, thus maximizing battery performance.

[0003] However, due to the immaturity of research on liquid cooling structures for batteries, the heat exchange efficiency of the cooling structures is not high, which may lead to problems such as uneven temperature inside the module, and thus directly affect the performance, lifespan, and safety and reliability of the battery. Summary of the Invention

[0004] This application provides an electrode structure and a high-capacity battery, which can solve the problems of low battery performance, service life, and system safety and reliability.

[0005] To solve the above-mentioned technical problems, the embodiments of this application adopt the following technical solutions:

[0006] A first aspect of this application provides an electrode structure, comprising: an electrode body, a terminal block connected to the electrode body, and a heat-conducting unit. The electrode body has at least one opening, and the heat-conducting unit passes through at least one opening and connects to the electrode body, with the heat-conducting unit respectively conforming to the inner wall of each opening.

[0007] A second aspect of this application provides a high-capacity battery, which includes at least one terminal structure as described in the first aspect, a current collector, a cell, a casing, and a top cover. The cell and the current collector are both disposed within the casing, and the terminal body of each of the at least one terminal structure is attached to the current collector, with the terminal body of each terminal structure passing through the top cover.

[0008] In this embodiment, the electrode post structure includes: an electrode post body, a terminal connected to the electrode post body, and a heat-conducting unit. Each terminal has at least one opening, and the heat-conducting unit passes through at least one opening and connects to the electrode post body, with each heat-conducting unit fitting against the inner wall of each opening. Because an electrode post structure can be incorporated into a large-capacity battery, during high-current charging and discharging, the heat generated by the battery cell is concentrated at both ends of the battery tabs. This invention uses a connection between the tabs and a current collector, transferring the generated heat from the current collector to the electrode post body in contact with it. The heat-conducting unit embedded within the electrode post can evenly distribute the heat, preventing localized overheating and battery combustion, thus achieving rapid cooling. Attached Figure Description

[0009] Figure 1 This is one of the structural schematic diagrams of the pole post structure provided in the embodiments of this application;

[0010] Figure 2 This is the second schematic diagram of the pole post structure provided in the embodiments of this application;

[0011] Figure 3 This is the third schematic diagram of the pole post structure provided in the embodiments of this application;

[0012] Figure 4 The fourth schematic diagram of the pole post structure provided in the embodiments of this application;

[0013] Figure 5 This is one of the structural schematic diagrams of the battery provided in the embodiments of this application;

[0014] Figure 6 This is a second schematic diagram of the battery structure provided in the embodiments of this application;

[0015] Figure 7 This is the third schematic diagram of the battery structure provided in the embodiments of this application;

[0016] Figure 8 This is the fourth schematic diagram of the battery structure provided in the embodiments of this application; Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, rather than to describe a specific order of objects.

[0019] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple elements means two or more elements.

[0020] In this article, the term "and / or" describes the relationship between related objects, indicating that there can be three relationships. The symbol " / " indicates that the related objects are in an "or" relationship, such as input / output, which means input or output.

[0021] In the embodiments of this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0022] This application provides an electrode post structure, comprising: an electrode post body, terminals connected to the electrode post body, and a heat-conducting unit. The electrode post has at least one opening, through which the heat-conducting unit connects to the electrode post body, and the heat-conducting unit is respectively attached to the inner wall of each opening. Since an electrode post structure can be incorporated into a large-capacity battery, during high-current charging and discharging of the large-capacity battery, the heat generated by the cell is concentrated at both ends of the battery tabs. This invention uses a connection between the tabs and a current collector, transferring the generated heat from the current collector to the electrode post body in contact with it. The heat-conducting unit embedded within the electrode post can evenly distribute the heat, preventing localized overheating and battery combustion, thus achieving rapid cooling.

[0023] The following detailed description, in conjunction with the accompanying drawings, of a pole structure and battery provided in this application through specific embodiments and application scenarios, will illustrate this application in detail.

[0024] Figure 1 A schematic diagram of a pole post structure provided in an embodiment of this application is shown. Figure 1 As shown, the pole structure 10 includes: pole body 11, terminal 12 connected to pole body 11, and heat conduction unit 13.

[0025] The electrode body 11 has at least one opening, and the heat-conducting unit 13 passes through at least one opening and connects to the electrode body 11. The heat-conducting unit 13 is respectively attached to the inner wall of each opening.

[0026] Optionally, in this embodiment, the at least one opening is located on the side close to the electrode body, so that when in use, the at least one opening is closer to the battery tab, thereby achieving easier heat dissipation.

[0027] Optionally, in the embodiments of this application, the shape of each of the at least one opening can be any of the following: square or circular.

[0028] It is understandable that each opening can be a cylindrical hole or a square groove.

[0029] Optionally, in this embodiment of the application, the heat-conducting unit 13 may specifically be a heat pipe.

[0030] Optionally, in this embodiment of the application, the heat-conducting unit 13 is a hollow structure, and a phase change material is disposed in the internal cavity of the heat-conducting unit 13.

[0031] It's understandable that a heat pipe can be a hollow structure, filled with phase change material under vacuum. The working section of a heat pipe consists of an evaporation section and a condensation section. In the evaporation section, the phase change material inside the pipe evaporates, carrying away heat—the latent heat of vaporization of the phase change material. The vapor flows from the central channel to the condensation section of the heat pipe, condenses into liquid, and releases its latent heat. Under the influence of capillary force or gravity, the liquid flows back to the evaporation section. This completes a closed loop, transferring a large amount of heat from the heating section to the heat dissipation section. The thermal conductivity of a heat pipe is 10 to 100 times that of metals. Heat pipe technology has been widely used in military, aerospace, and other industries, and is also used in the battery industry for cooling battery cells.

[0032] Optionally, in this embodiment of the application, the above-mentioned pole structure 10 further includes at least one heat dissipation unit, which is connected to the end of the heat conduction unit 13 away from the terminal 12.

[0033] The aforementioned heat dissipation unit includes at least one of the following: a cooling fan, heat dissipation fins, and a semiconductor cooling plate.

[0034] Optionally, in the embodiments of this application, the above-mentioned semiconductor cooling chip utilizes the Peltier effect of semiconductor materials. When direct current passes through a thermocouple composed of two different semiconductor materials connected in series, heat can be absorbed and released at the two ends of the thermocouple, thereby achieving the purpose of cooling.

[0035] The following will illustrate the pole structure with three different examples.

[0036] Further, optionally, in the embodiments of this application, such as Figure 2 As shown in (A), each of the at least one opening 14 is a cylindrical hole. Correspondingly, the heat-conducting unit 13 can specifically be a vertical heat pipe. It can be understood that the electrode body 11 has a terminal 12, and on the opposite side of the terminal 12, at least one opening 14 (i.e., 5 cylindrical holes) is opened, such as... Figure 2 As shown in (B), at least one heat-conducting unit 13 (i.e., a vertical heat pipe) is inserted into a port 14.

[0037] Alternatively, in this embodiment of the application, when the heat-conducting unit 13 is a vertical heat pipe, at least one heat dissipation unit includes a cooling fan. The cooling fan is attached to the heat-conducting unit 13.

[0038] Further, optionally, in the embodiments of this application, such as Figure 3 As shown in (A), each of the at least one opening 14 is a cylindrical hole. Correspondingly, the heat-conducting unit 13 can specifically be a bent heat pipe. It can be understood that the electrode body 11 has a terminal 12, and on the opposite side of the terminal 12, at least one opening 14 (i.e., 5 cylindrical holes) is opened, such as... Figure 3 As shown in (B), at least one heat-conducting unit 13 (i.e., a bent heat pipe) is inserted into a port 14.

[0039] Alternatively, in this embodiment of the application, when the heat-conducting unit 13 is a curved heat pipe, at least one heat dissipation unit includes heat dissipation fins and a thermoelectric cooling plate. The thermoelectric cooling plate is attached to the heat-conducting unit 13, and the thermoelectric cooling plate is attached to the heat dissipation fins.

[0040] Further, optionally, in the embodiments of this application, such as Figure 4 As shown in (A), each of the at least one opening 14 is a square slot. Correspondingly, the heat-conducting unit 13 can specifically be a flat heat pipe. It can be understood that the electrode body 11 has a terminal 12, and on the opposite side of the terminal 12, at least one opening 14 (i.e., one square slot) is opened, such as... Figure 4 As shown in (B), at least one heat-conducting unit 13 (i.e., a flat heat pipe) is inserted into a port 14.

[0041] Further optionally, in this embodiment of the application, when the heat-conducting unit 13 is a curved heat pipe, at least one heat dissipation unit includes heat dissipation fins. The heat-conducting unit 13 is attached to the heat dissipation fins.

[0042] This application provides an electrode post structure, comprising: an electrode post body, terminals connected to the electrode post body, and a heat-conducting unit. The electrode post body has at least one opening, through which the heat-conducting unit connects to the electrode post body, and the heat-conducting unit is respectively attached to the inner wall of each opening. Since an electrode post structure can be incorporated into a large-capacity battery, during high-current charging and discharging of the large-capacity battery, the heat generated by the cell is concentrated at both ends of the battery tabs. This invention uses a connection between the tabs and a current collector, transferring the generated heat from the current collector to the electrode post body in contact with it. The heat-conducting unit embedded within the electrode post can evenly distribute the heat, preventing localized overheating and battery combustion, thus achieving rapid cooling.

[0043] Figure 5A schematic diagram of the structure of a battery according to an embodiment of this application is shown. Figure 5 As shown, the battery 20 includes the terminal structure 10, current collector 21, cell 22, casing 23 and top cover 24 in the above embodiments;

[0044] The battery cell 22 and the current collector 21 are both disposed inside the housing 23. The electrode body 11 of each electrode structure 10 in at least one electrode structure 10 is attached to the current collector 21, and the electrode body 11 of each electrode structure 10 passes through the upper cover 24.

[0045] Optionally, in the embodiments of this application, combined with Figure 5 ,like Figure 6 As shown, the heat-conducting unit 13 in the at least one pole post structure 10 is a vertical heat-conducting unit, and the heat dissipation unit of the at least one pole post structure 10 includes at least one heat dissipation unit, with each vertical heat-conducting unit corresponding to one heat dissipation unit; wherein, the heat dissipation unit is a cooling fan 25.

[0046] Optionally, in the embodiments of this application, combined with Figure 5 ,like Figure 7 As shown, the heat-conducting unit 13 in the at least one pole post structure 10 is a bent heat-conducting unit, and the heat dissipation unit of the at least one pole post structure 10 includes at least one heat dissipation unit, and one vertical heat-conducting unit corresponds to one heat dissipation unit; wherein, the heat dissipation unit is: heat dissipation fin 26 and semiconductor cooling plate 27.

[0047] Optionally, in the embodiments of this application, combined with Figure 5 ,like Figure 8 As shown, the heat-conducting unit 13 in the at least one pole post structure 10 is a flat heat-conducting unit, and the heat dissipation unit of the at least one pole post structure 10 includes at least one heat dissipation unit, and one vertical heat-conducting unit corresponds to one heat dissipation unit; wherein, the heat dissipation unit is: heat dissipation fin 28.

[0048] This application provides a battery comprising at least one terminal structure, a current collector, a cell, a casing, and a top cover. The cell and current collector are both housed within the casing. The terminal body of each of the at least one terminal structure is attached to the current collector, and the terminal body of each terminal structure passes through the top cover. Since terminal structures can be incorporated into a large-capacity battery, during high-current charging and discharging, the heat generated by the cell is concentrated at both ends of the battery's tabs. This invention connects the tabs to the current collector, transferring the generated heat to the contacting terminal body. A heat-conducting unit embedded within the terminal evens out the heat, preventing localized overheating and battery combustion, thus achieving rapid cooling.

[0049] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0050] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A large capacity battery, characterized by comprising: The battery comprises at least one pole structure, a current collector plate, a battery cell, a shell and an upper cover; The pole structure comprises a pole body, a terminal post connected with the pole body and a heat conduction unit; the pole body is used to be attached with the current collector plate; The battery cell and the current collector plate are arranged in the shell, the pole body of each pole structure in the at least one pole structure is attached with the current collector plate, and the pole body of each pole structure passes through the upper cover; the battery cell tab is connected with the current collector plate, and the generated heat is transmitted to the pole body in contact with the current collector plate by the current collector plate; At least one through hole is arranged on the pole body, the heat conduction unit is connected with the pole body through the at least one through hole, and the heat conduction unit is attached with the inner wall of each through hole; the heat conduction unit is a hollow structure, and a phase change material is arranged in the internal cavity of the heat conduction unit; The pole structure further comprises at least one heat dissipation unit, and the at least one heat dissipation unit is connected with the end of the heat conduction unit away from the terminal post.

2. The battery of claim 1, wherein, The heat conduction unit in the at least one pole structure is a vertical heat conduction unit, the heat dissipation unit of the at least one pole structure comprises at least one heat dissipation unit, and one vertical heat conduction unit corresponds to one heat dissipation unit; The heat dissipation unit is a heat dissipation fan.

3. The battery of claim 1, wherein, The heat conduction unit in the at least one pole structure is a curved heat conduction unit, the heat dissipation unit of the at least one pole structure comprises at least one heat dissipation unit, and one vertical heat conduction unit corresponds to one heat dissipation unit; The heat dissipation unit is a heat dissipation fin or a semiconductor refrigeration plate.

4. The battery of claim 1, wherein, The heat conduction unit in the at least one pole structure is a flat heat conduction unit, the heat dissipation unit of the at least one pole structure comprises at least one heat dissipation unit, and one vertical heat conduction unit corresponds to one heat dissipation unit; The heat dissipation unit is a heat dissipation fin.

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