All-electrode power battery with heat dissipation function, battery pack and application of all-electrode power battery

Abstract

The invention provides an all-electrode power battery with a heat dissipation function, a battery pack and application thereof. The power battery comprises a battery positive electrode, a battery cell, a battery negative electrode, a battery cell insulation sleeve and a shell. The battery cell is of a flat cuboid laminated structure and comprises a battery cell positive plate, a battery cell positive electrode, an isolating membrane, a battery cell negative plate and a battery cell negative electrode. The battery cell positive electrode is the upper edge of the battery cell positive plate in the length direction and is not coated with electrode dressing; and the cell negative electrode is the lower edge of the cell negative plate in the length direction and is not coated with a negative electrode dressing. And an isolating membrane is arranged between the battery cell positive plate and the battery cell negative plate. The positive electrode and the negative electrode of the battery cell simultaneously have double functions of electric conduction and heat conduction, the positive electrode and the negative electrode of the battery cell are correspondingly and electrically connected with the positive electrode and the negative electrode of the battery to respectively form an electric and heat-conducting conduction path of the positive electrode side and the negative electrode side, so that the direct heat dissipation effect on the battery cell can be realized, and the heat dissipation efficiency and the heat dissipation capability of the power battery are improved; and the safety risk caused by battery thermal runaway is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a full-electrode power battery with heat dissipation function, a battery pack and applications thereof. Background Art

[0002] Power batteries are mainly used in electric vehicles, electric ships, electric aircraft and energy storage fields. Driven by the rapid development of these fields, the demand and development of power batteries are very rapid.

[0003] Existing power batteries have limitations in electrical and mechanical structures, and there are four problems: the first is the convenience of power battery use and the maintainability of power battery PACK, the second is the electrical performance of power batteries, the third is the thermal runaway problem caused by power battery heating, and the fourth is the real-time warning problem of power batteries. There have been no good solutions to these problems before.

[0004] Regarding the ease of use and maintainability of power battery PACK, as well as the electrical performance of power batteries, good solutions are provided in the existing designs proposed by the inventor with application number 2023112368460 and invention name: polar battery, polar battery array, polar battery CTC and application device.

[0005] The current heat dissipation solution for power batteries is to use cold air or liquid cooling to cool the outer shell of the power battery. In the research on power batteries, the inventors noticed that the heat source of the power battery comes from the battery cell, and the heat dissipation solution for the outer shell of the power battery is like scratching an itch with a shoe, and cannot completely solve the heat dissipation problem of the power battery. Summary of the invention

[0006] In view of the technical problems existing in the heat dissipation of power batteries in the prior art, according to the first aspect of the present invention, a full-electrode power battery with a heat dissipation function is proposed, wherein the full-electrode power battery comprises a positive electrode, a negative electrode, a battery cell, a battery cell insulation sleeve and a shell, wherein the battery cell insulation sleeve wraps the battery cell and is placed in the shell, and the shell and the positive electrode, the negative electrode and the battery cell are electrically insulated from each other and sealed via the shell to form an integral full-electrode power battery, wherein: The battery cell is a flat rectangular stacked structure, and the battery cell comprises a battery cell positive electrode sheet, a battery cell positive electrode, a separator, a battery cell negative electrode sheet and a battery cell negative electrode; The positive electrode of the battery cell is formed as the upper edge of the positive electrode sheet of the battery cell in the length direction, and the upper edge portion is not coated with the positive electrode dressing; The negative electrode of the battery cell is formed as the lower edge of the negative electrode sheet of the battery cell in the length direction, and the lower edge portion is not coated with the negative electrode dressing; An isolation film is provided between the positive electrode sheet of the battery cell and the negative electrode sheet of the battery cell; Furthermore, the battery positive electrode is electrically connected to the battery cell positive electrode, so that the battery positive electrode forms an electrical and thermal conduction path for the battery cell positive electrode and the battery cell positive electrode sheet; The battery negative electrode is electrically connected to the cell negative electrode, so that the battery negative electrode forms an electrical and thermal conduction path for the cell negative electrode and the cell negative electrode sheet.

[0007] Therefore, through the inventor's research on power battery cells, it was found that the substrates of the electrode sheets of power battery cells are all metal / alloy materials such as copper and aluminum, which are good carriers of heat conduction. Therefore, the inventor proposed to use the substrate of the electrode sheet to directly conduct the heat of the power battery cell to substantially solve the heat dissipation problem of the power battery.

[0008] Combined with the design between the battery cell and the positive and negative electrodes of the battery of the full-electrode power battery, the positive and negative electrodes of the battery cell have the dual functions of electrical conduction and heat conduction. The positive and negative electrodes of the battery cell are electrically connected to the positive and negative electrodes of the battery respectively, forming electrical + thermal conduction pathways on the positive and negative sides respectively. Compared with the traditional method of heat dissipation of the battery shell, the full-electrode power battery and its heat dissipation solution proposed in the present invention can achieve direct heat dissipation effect on the battery cell, improve the heat dissipation efficiency and heat dissipation capacity of the power battery, and reduce the safety risks caused by thermal runaway of the battery.

[0009] As an optional embodiment, the heat of the substrates of the battery cell positive electrode sheet and the battery cell negative electrode sheet is directly conducted to the outside of the battery cell via the battery cell positive electrode and the battery positive electrode, and the battery cell negative electrode and the battery negative electrode, respectively.

[0010] As an optional embodiment, the battery positive electrode is a pipeline positive electrode, and the battery negative electrode is a pipeline negative electrode.

[0011] As an optional embodiment, a hollow pipe structure is provided inside the positive electrode and the negative electrode of the battery, and both ends of the pipe structure are respectively connected to a cooling system, so that the heat of the power battery cell is directly dissipated through the cooling system.

[0012] As an optional embodiment, the positive electrode of the battery cell and the negative electrode of the battery cell are connected to form an integral structure after being processed by at least one of welding, evaporation, spraying, and calendering, and have the dual functions of electrical conduction and heat conduction.

[0013] As an optional embodiment, the positive electrode of the battery cell and the positive electrode of the battery, as well as the negative electrode of the battery cell and the negative electrode of the battery, are crimped or welded to form an integral structure.

[0014] As an optional embodiment, the positive electrode of the cell and the positive electrode of the battery, as well as the negative electrode of the cell and the negative electrode of the battery, are respectively matched in plane or concave-convex manner, and then welded or crimped to form an integral structure.

[0015] As an optional embodiment, the power battery is a liquid electrolyte battery, a solid electrolyte battery or a condensed state battery.

[0016] According to a second aspect of the present invention, a full-electrode power battery pack with heat dissipation function is provided, which is composed of a plurality of the aforementioned full-electrode power batteries with heat dissipation function, wherein the battery positive electrode and the battery negative electrode of two adjacent full-electrode power batteries are sequentially connected in series through corresponding electrode contact rails, and the electrode contact rails on the upper side of the full-electrode power battery pack are staggered with the electrode contact rails on the lower side, thereby forming an electrical circuit of the full-electrode power battery pack with heat dissipation function; The full-electrode power battery of the full-electrode power battery pack is slidably inserted between the electrode contact rails disposed on the upper and lower sides of the full-electrode power battery pack to achieve electrical connection and mechanical fixation of the full-electrode power battery; The positive electrode and negative electrode of each full-electrode power battery are connected to an external cooling system.

[0017] As an optional embodiment, the cross-section of the electrode contact rail is "E"-shaped, and a plurality of elastic contact electrodes are respectively provided on the bottom and the inner sides of both sides of the electrode contact rail. A limit grid is arranged between the two contact electrodes at the bottom, and the limit grid controls the fixed interval of the full-electrode power battery with heat dissipation function.

[0018] According to a third aspect of the present invention, an electric vehicle is provided, comprising the aforementioned full-electrode power battery pack with heat dissipation function as its energy system or at least a part of the energy system.

[0019] According to a fourth aspect of the present invention, an electric ship is provided, comprising the aforementioned full-electrode power battery pack with heat dissipation function as its energy system or at least a part of the energy system.

[0020] According to a fifth aspect of the purpose of the present invention, a demagnetization system for an electric ship is proposed, comprising the aforementioned full-electrode power battery pack with heat dissipation function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in each figure may be represented by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0022] Figure 1 is a schematic diagram of a full-electrode power battery with heat dissipation function according to an embodiment of the present invention.

[0023] Figure 2Schematic diagram of a battery pack composed of full-electrode power batteries with heat dissipation function according to an embodiment of the present invention.

[0024] The meanings of the reference numerals in the figures are as follows: 1-battery positive electrode, 2-battery negative electrode, 3-battery cell, 6-contact electrode rail; 12-battery cell positive electrode sheet, 13 battery cell positive electrode; 22-battery cell negative electrode sheet, 23 battery cell negative electrode; 30-isolating film 30; 100-full electrode power battery; 200-coolant circulation pipeline. DETAILED DESCRIPTION

[0025] In order to better understand the technical content of the present invention, specific embodiments are described below with reference to the accompanying drawings.

[0026] Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, in which many illustrative embodiments are shown. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of a number of ways, since the concepts and embodiments disclosed in the present invention are not limited to any implementation. In addition, some aspects of the present invention can be used alone or in any suitable combination with other aspects of the present invention.

[0027] {Example 1} Combination Figure 1 , 2 As shown, the full-electrode power battery with heat dissipation function according to an embodiment of the present invention includes a battery positive electrode 1, a battery negative electrode 2, a battery cell 3, a battery cell insulation sleeve and a shell. The battery cell design of the application No. 2023112368460 proposed by the inventor is cited here as a basis, and the battery cell design of a long strip of non-polar battery is adopted as an example. The battery cell insulation sleeve ( Figure 1 The outer shell (not shown) wraps the battery cell 3 and is then placed in the outer shell. The outer shell serves as the insulating shell of the battery cell of the power battery, and plays the role of insulation, mechanical support and sealing. The outer shell is electrically insulated from the battery positive electrode 1, the battery negative electrode 2 and the battery cell 3, and is sealed by the outer shell to form an integral full-electrode power battery.

[0028] In the embodiment of the present invention, the battery cell 3 is a flat rectangular stacked structure, and the battery cell 3 includes a battery cell positive electrode sheet 12 , a battery cell positive electrode 13 , a separator 30 , a battery cell negative electrode sheet 22 and a battery cell negative electrode 23 .

[0029] It should be understood that both the battery cell positive electrode sheet 12 and the battery cell negative electrode sheet 22 adopt a substrate design, such as a long strip substrate, with an electrode material layer coated on the surface.

[0030] Combination Figure 1 As shown, the cell positive electrode 13 is formed as the upper edge of the cell positive electrode sheet 12 in the length direction, and the upper edge portion is not coated with the positive electrode dressing.

[0031] The cell negative electrode 23 is formed as the lower edge of the cell negative electrode sheet 22 in the length direction, and the lower edge portion is not coated with a negative electrode dressing.

[0032] An isolation film 30 is disposed between the positive electrode sheet 12 and the negative electrode sheet 22 to insulate the positive electrode sheet 12 and the negative electrode sheet 22. It is particularly preferred that the isolation film 30 has a size larger than the positive electrode sheet 12 and the negative electrode sheet 22 to ensure isolation and insulation between the two.

[0033] Combination Figure 1 As shown, the battery positive electrode 1 is electrically connected to the battery cell positive electrode 13 , so that the battery positive electrode 1 forms an electrical conduction and heat conduction path for the battery cell positive electrode 13 and the battery cell positive electrode sheet 12 .

[0034] The battery negative electrode 2 is electrically connected to the cell negative electrode 23 , so that the battery negative electrode 2 forms an electrical and thermal conduction path for the cell negative electrode 23 and the cell negative electrode sheet 22 .

[0035] As a result, the heat of the substrates of the battery cell positive electrode sheet 12 and the battery cell negative electrode sheet 22 is directly conducted to the outside of the battery cell via the battery cell positive electrode 13 and the battery positive electrode 1, and the battery cell negative electrode 23 and the battery negative electrode 2, respectively, to achieve efficient and direct heat dissipation of the battery cell.

[0036] It should be understood that in the embodiment of the present invention, the substrates of the electrode sheets of the battery cells (battery cell positive electrode sheet 12 and battery cell negative electrode sheet 22) are all of existing design, for example, metal / alloy materials such as copper and aluminum. Thus, the heat of the substrates of the positive electrode sheet 12 and the negative electrode sheet 22 of the battery cell is directly conducted to the outside of the battery cell 3 via the positive electrode 1 and the negative electrode 2 of the battery cell, respectively. The corresponding active materials are coated on the positive electrode sheet and the negative electrode sheet of the battery cell, respectively, and the existing positive active materials and negative active materials can be used. For example, the positive active materials include but are not limited to lithium iron phosphate, lithium manganese phosphate, lithium iron manganese phosphate, lithium vanadium phosphate, lithium cobalt phosphate, lithium cobalt oxide, lithium manganese oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxygen ternary materials, lithium nickel cobalt aluminum oxygen ternary materials and lithium nickel manganese cobalt aluminum oxygen quaternary materials. The negative active materials include but are not limited to at least one of graphite, natural graphite, mesophase carbon microspheres, and silicon-carbon negative electrode materials.

[0037] In an optional embodiment, the area of ​​the negative electrode active material coated on the negative electrode sheet 22 of the battery cell is larger than the area of ​​the positive electrode active material coated on the positive electrode sheet 12 of the battery cell.

[0038] In an optional embodiment, the battery positive electrode 1 is a pipe-type positive electrode, and the battery negative electrode 2 is a pipe-type negative electrode.

[0039] The battery positive electrode 1 and the battery negative electrode 2 are both provided with hollow pipe structures, and both ends of the pipe structures are respectively connected to an external cooling system, and the cooling system is used to directly dissipate heat from the battery cell 3 of the power battery.

[0040] As an optional embodiment, in the design of the battery cell 3, the multiple battery cell positive electrodes 13 and the multiple battery cell negative electrodes 23 are respectively and as a whole processed by at least one of welding, evaporation, spraying, and calendaring, so that the multiple battery cell positive electrodes 13 are connected to form an integral structure, and the multiple battery cell negative electrodes 23 are connected to form an integral structure, which have the dual functions of electrical conduction and heat conduction respectively.

[0041] As an optional embodiment, the cell positive electrode 13 and the battery positive electrode 1, as well as the cell negative electrode 23 and the battery negative electrode 2, are crimped or welded to form an integral structure, an electrical circuit and a heat conduction path to achieve electrical conduction and heat removal of the cell.

[0042] As an optional embodiment, the cell positive electrode 13 and the battery positive electrode 1, as well as the cell negative electrode 23 and the battery negative electrode 2, are flatly matched or concavely matched and then welded or crimped to form an integral structure.

[0043] As an optional embodiment, the power battery of the embodiment of the present invention is a liquid electrolyte battery, a solid electrolyte battery or a condensed state battery.

[0044] {Example 2} Combination Figure 1 , Figure 2 As shown, according to an embodiment of the present invention, a full-electrode power battery pack with heat dissipation function is provided, which is composed of a plurality of full-electrode power batteries 100 with heat dissipation function in the above-mentioned embodiments connected in series. The battery positive electrode 1 and the battery negative electrode 2 of two adjacent full-electrode power batteries 100 are connected in series in sequence through corresponding electrode contact rails 6, and the electrode contact rails on the upper side of the full-electrode power battery pack are staggered with the electrode contact rails on the lower side, forming an electrical circuit of the full-electrode power battery pack with heat dissipation function.

[0045] Each full-electrode power battery 100 of the full-electrode power battery pack is slidably inserted between the electrode contact rails 6 disposed on the upper and lower sides of the full-electrode power battery pack to achieve electrical connection and mechanical fixation of the full-electrode power battery.

[0046] The battery positive electrode 1 and the battery negative electrode 2 of each full-electrode power battery are connected to an external cooling system, so that the heat generated during the charging and discharging process of the battery cell is simultaneously transferred to the battery positive electrode 1 and the battery negative electrode 2 by the battery cell positive electrode sheet 12 and the battery cell negative electrode sheet 22.

[0047] Among them, the battery positive electrode 1 and the battery negative electrode 2 are designed to have an electrode shape with an internal hollow pipe. The electrode surfaces of the tubular battery positive electrode 1 and the tubular battery negative electrode 2 are provided with a battery electrode pipe interface connected to an external cooling system. The tubular battery positive electrode 1 and the tubular battery negative electrode 2 are respectively connected to the coolant circulation pipe 200 of the cooling system. During operation, the circulating coolant of the cooling system takes away the heat generated by the power battery in real time, realizing direct and efficient heat dissipation of the battery cell, thereby solving the heat dissipation problem of the power battery from the source and fundamentally.

[0048] like Figure 2 In the coolant circulation pipeline 200 shown, the arrow directions exemplarily represent the flow directions of the coolant, which respectively flow in from one end of the tubular battery positive electrode 1 and the tubular battery negative electrode 2, and after directly dissipating the heat through the pipelines inside the battery positive electrode 1 and the battery negative electrode 2, flow out from the other end of the battery positive electrode 1 and the battery negative electrode 2 to achieve circulation cooling.

[0049] In an optional embodiment, the external cooling system is particularly preferably a liquid cooling system, in which the coolant flowing in the coolant circulation pipe enters the tubular battery positive electrode 1 and the tubular battery negative electrode 2, directly taking away the heat generated during the charging and discharging process of the battery cell, thereby achieving efficient and direct heat dissipation.

[0050] As an optional embodiment, in the design of the battery pack, the cross section of the electrode contact rail 5 is in the shape of an "E", and the electrode contact rail design with application number 2023112368460 proposed by the inventor is cited as a basis to realize the electrical circuit and mechanical fixation between multiple power batteries. As an example, a plurality of elastic contact electrodes are respectively provided at the bottom and the inner sides of both sides of the electrode contact rail 5, and a limit grid is provided between the two contact electrodes at the bottom, and the limit grid controls the fixed interval of the full-electrode power battery with heat dissipation function.

[0051] {Example 3} According to an embodiment of the present invention, an electric vehicle is further provided, comprising the full-electrode power battery pack with heat dissipation function of the aforementioned embodiment as its energy system or at least a part of the energy system.

[0052] {Example 4} According to an embodiment of the present invention, an electric ship is further provided, comprising the full-electrode power battery pack with heat dissipation function of the aforementioned embodiment as its energy system or at least a part of the energy system.

[0053] {Example 5} According to an embodiment of the present invention, a demagnetization system for an electric ship is also proposed, comprising the aforementioned full-electrode power battery pack with heat dissipation function.

[0054] It should be noted that, although the above embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent process changes made using the contents of the present invention specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A full-electrode power battery with heat dissipation function, characterized by: The full-electrode power battery comprises a battery positive electrode (1), a battery negative electrode (2), a battery cell (3), a battery cell insulation sleeve and a shell, wherein the battery cell insulation sleeve wraps the battery cell (3) and is placed in the shell, and the shell and the battery positive electrode (1), the battery negative electrode (2) and the battery cell (3) are electrically insulated from each other and sealed via the shell to form an integral full-electrode power battery, wherein: The battery cell (3) is a flat rectangular stacked structure, and the battery cell (3) comprises a battery cell positive electrode sheet (12), a battery cell positive electrode (13), a separator (30), a battery cell negative electrode sheet (22) and a battery cell negative electrode (23); The cell positive electrode (13) is formed as the upper edge of the cell positive electrode sheet (12) in the length direction, and the upper edge portion is not coated with a positive electrode dressing; The cell negative electrode (23) is formed as the lower edge of the cell negative electrode sheet (22) in the length direction, and the lower edge portion is not coated with a negative electrode dressing; An isolation film (30) is provided between the battery cell positive electrode sheet (12) and the battery cell negative electrode sheet (22); Furthermore, the battery positive electrode (1) is electrically connected to the battery cell positive electrode (13), so that the battery positive electrode (1) forms an electrical conduction and heat conduction path for the battery cell positive electrode (13) and the battery cell positive electrode sheet (12); The battery negative electrode (2) is electrically connected to the battery cell negative electrode (23), so that the battery negative electrode (2) forms an electrical conduction and heat conduction path for the battery cell negative electrode (23) and the battery cell negative electrode sheet (22).

2. The full-electrode power battery with heat dissipation function according to claim 1 is characterized by: The heat of the substrates of the battery cell positive electrode sheet (12) and the battery cell negative electrode sheet (22) is directly conducted to the outside of the battery cell (3) via the battery cell positive electrode (13) and the battery positive electrode (1), and via the battery cell negative electrode (23) and the battery negative electrode (2), respectively.

3. The full-electrode power battery with heat dissipation function according to claim 1 is characterized by: The battery positive electrode (1) and the battery negative electrode (2) are both provided with a hollow pipe structure, and both ends of the pipe structure are respectively connected to a cooling system, so that the heat of the power battery cell (3) is directly dissipated through the cooling system.

4. The full-electrode power battery with heat dissipation function according to claim 1 is characterized by: The battery cell positive electrode (13) and the battery cell negative electrode (23) are connected as a whole through at least one of welding, evaporation, spraying, and calendering to form an integral structure, and have the dual functions of electrical conduction and heat conduction.

5. The full-electrode power battery with heat dissipation function according to claim 1 is characterized by: The cell positive electrode (13) and the battery positive electrode (1), and the cell negative electrode (23) and the battery negative electrode (2) are respectively crimped or welded to form an integral structure.

6. The full-electrode power battery with heat dissipation function according to claim 1 is characterized by: The cell positive electrode (13) and the battery positive electrode (1), as well as the cell negative electrode (23) and the battery negative electrode (2), are respectively flatly matched or concavely matched, and then welded or crimped to form an integral structure.

7. The full-electrode power battery with heat dissipation function according to any one of claims 1 to 6, characterized in that: The power battery is a liquid electrolyte battery, a solid electrolyte battery or a condensed state battery.

8. A full-electrode power battery pack with heat dissipation function, characterized by: Composed of a plurality of full-electrode power batteries with heat dissipation function as described in any one of claims 1 to 7, the battery positive electrodes and battery negative electrodes of two adjacent full-electrode power batteries are sequentially connected in series through corresponding electrode contact rails, and the electrode contact rails on the upper side of the full-electrode power battery pack are staggered with the electrode contact rails on the lower side, forming an electrical circuit of the full-electrode power battery pack with heat dissipation function; The full-electrode power battery of the full-electrode power battery pack is slidably inserted between the electrode contact rails disposed on the upper and lower sides of the full-electrode power battery pack to achieve electrical connection and mechanical fixation of the full-electrode power battery; The positive electrode and negative electrode of each full-electrode power battery are connected to an external cooling system.

9. The full-electrode power battery pack with heat dissipation function according to claim 8, characterized in that: The cross-section of the electrode contact rail is in the shape of an "E", and a plurality of elastic contact electrodes are respectively provided at the bottom and the inner sides of both sides of the electrode contact rail. A limit grid is provided between the two contact electrodes at the bottom, and the limit grid controls the fixed interval of the full-electrode power battery with heat dissipation function.

10. An electric vehicle, characterized in that: Comprising a full-electrode power battery pack with heat dissipation function as described in claim 8 or 9.

11. An electric ship, characterized in that: Comprising a full-electrode power battery pack with heat dissipation function as described in claim 8 or 9.

12. A degaussing system for an electric ship, characterized by: Comprising a full-electrode power battery pack with heat dissipation function as described in claim 8 or 9.

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