Battery pole piece, battery pole piece stacking assembly and battery
By providing the first and second pole ears on two adjacent sides of the battery pole body, the coordinated divert of the pole body during high-speed charging and discharging is achieved, and the problems of poor heat dissipation performance and heat accumulation of the existing battery pole are solved, which significantly improves the safety performance of the battery.
Patent Information
- Application Number
- CN202420673510.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The existing battery pole plates have poor heat dissipation performance when charging for a long time with large-scale charge, which is prone to heat accumulation and poses safety hazards.
A battery electrode plate is designed, wherein the first electrode plate ear and the second electrode plate ear are respectively provided on two adjacent sides of the electrode plate body, and the electrode dressing area is provided inside the electrode plate body. When the electrode plate body is charged and discharged, the first electrode plate ear and the second electrode plate ear can be coordinated to divert, greatly improving the safety performance of the battery during high-speed charging and discharging.
It effectively avoids the problem of poor heat accumulation and heat dissipation performance of the pole plate body during high-speed charging and discharging, and greatly improves the safety performance of the battery.
Smart Images
Figure CN222600985U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of battery technology, and in particular to a battery pole piece, a battery pole piece stacking assembly and a battery. Background Art
[0002] In the prior art, the electrode sheets of the battery include positive electrode sheets and negative electrode sheets, and the positive electrode sheets and the negative electrode sheets are stacked alternately in sequence to form a battery cell. Moreover, no matter the positive electrode sheet or the negative electrode sheet, a pole ear is set on one side thereof, and the pole ear in the positive electrode sheet and the pole ear in the negative electrode sheet are stacked alternately in two opposite directions to improve the charge and discharge performance of the battery.
[0003] However, with the continuous development of technology, the demand for high-power charging and discharging of batteries is increasing. The electrode design structure of the battery in the existing technology has been difficult to meet. Long-term high-rate charging may affect the battery's heat dissipation performance and cause heat accumulation, posing a safety hazard.
[0004] Therefore, there is an urgent need for a new type of battery electrode structure on the market to solve the problems of poor heat dissipation performance, easy heat accumulation and certain safety hazards of battery electrodes in the prior art when charged at a high rate for a long time. Utility Model Content
[0005] The disclosed embodiments provide a battery pole piece, a battery pole piece stacking assembly and a battery, in order to solve the problems in the prior art of poor heat dissipation performance, easy heat accumulation and certain safety hazards when the battery pole piece is charged at a high rate.
[0006] The battery pole piece provided in the embodiment of the present disclosure includes a pole piece body, a first pole piece ear and a second pole piece ear;
[0007] The electrode body has an electrode dressing area inside;
[0008] The first pole piece ear is connected and arranged on a first side of the pole piece body;
[0009] The second pole piece ear is connected and arranged on the second side of the pole piece body;
[0010] Wherein, the first side and the second side are two adjacent sides of the pole piece body.
[0011] In one possible implementation manner, the pole piece body is configured as a rectangular sheet;
[0012] The first pole piece ear is connected to a width side of the rectangular sheet body with equal width;
[0013] The second pole piece ear is vertically connected to a length side of the rectangular sheet body.
[0014] In one possible implementation manner, the length of the rectangular sheet is denoted as L;
[0015] The distance between the second pole piece ear and the first pole piece ear is denoted as H, and satisfies L / 2<H<3L / 4.
[0016] In addition, the battery electrode stacking assembly provided in the embodiment of the present disclosure includes a plurality of positive electrode sheets and a plurality of negative electrode sheets;
[0017] The positive electrode sheets and the negative electrode sheets are arranged in an interlaced and stacked manner;
[0018] Wherein, the positive electrode sheet has a first positive electrode ear and a second positive electrode ear, and the first positive electrode ear and the second positive electrode ear are respectively connected and arranged on two adjacent sides of the positive electrode sheet;
[0019] The negative electrode sheet has a first negative electrode ear and a second negative electrode ear, and the first negative electrode ear and the second negative electrode ear are respectively connected and arranged on two adjacent sides of the negative electrode sheet.
[0020] In one possible implementation, in the plurality of positive electrode sheets arranged in sequence at intervals, the plurality of the first positive electrode tabs are arranged in the same direction, and two adjacent second positive electrode tabs are arranged back to back in two opposite directions.
[0021] In one possible implementation, in the plurality of negative electrode sheets arranged in sequence at intervals, the plurality of the first negative electrode tabs are arranged in the same direction, and two adjacent second negative electrode tabs are arranged back to back in two opposite directions.
[0022] In one embodiment, the plurality of first positive electrode tabs and the plurality of first negative electrode tabs are arranged back to back in two opposite directions.
[0023] In one possible implementation manner, the adjacent second positive electrode lug and the second negative electrode lug are arranged back to back in two opposite directions.
[0024] In one possible implementation manner, the positive electrode sheet and the negative electrode sheet are respectively of equal width and length and are completely overlapped.
[0025] In addition, the disclosed embodiment provides a battery, including a battery package and the above-mentioned battery pole piece stacking assembly;
[0026] Wherein, at least one of the above-mentioned battery pole sheet stacking assemblies is arranged in the battery package.
[0027] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:
[0028] The battery electrode provided in the embodiment of the present disclosure can be used as a positive electrode or a negative electrode in a battery. Compared with a battery electrode of a traditional structure, the battery electrode is provided with a first electrode ear and a second electrode ear on two adjacent sides of a electrode body, respectively. When the electrode body is charged and discharged, the first electrode ear and the second electrode ear can cooperate in current diversion. In this way, even under high-rate fully charged conditions, the actual overcurrent in the first electrode ear and the second electrode ear will not exceed the rated safety value, thereby effectively avoiding the problem of heat accumulation and poor heat dissipation performance of the electrode body, and greatly improving the safety performance of the battery during high-rate charging and discharging.
[0029] The battery electrode stacking assembly provided in the embodiment of the present disclosure includes multiple positive electrode sheets and multiple negative electrode sheets. When the battery electrode stacking assembly is charged and discharged at a high rate, the first positive electrode ear and the second positive electrode ear can simultaneously conduct the positive electrode sheet, and the first negative electrode ear and the second negative electrode ear can simultaneously conduct the negative electrode sheet. Similarly, it can effectively avoid large current from being concentrated in a single electrode ear, and effectively solve the problem of heat accumulation caused by high-rate charging and discharging of the battery.
[0030] The battery provided by the embodiment of the present disclosure includes the above-mentioned battery pole piece stacking assembly, and can achieve the same beneficial effects of the above-mentioned battery pole piece stacking assembly.
[0031] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:
[0033] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.
[0034] Figure 1 An exploded view of a battery pole piece stacking assembly provided by an embodiment of the present disclosure is shown;
[0035] Figure 2 An assembly diagram of a battery pole piece stacking assembly provided by an embodiment of the present disclosure is shown;
[0036] Figure 3 A schematic structural diagram of a battery electrode provided in an embodiment of the present disclosure is shown.
[0037] Explanation of the numbers in the figure: 1, positive electrode sheet; 11, first positive electrode ear; 12, second positive electrode ear; 2, negative electrode sheet; 21, first negative electrode ear; 22, second negative electrode ear; 3, electrode sheet body; 31, first electrode sheet ear; 32, second electrode sheet ear. DETAILED DESCRIPTION
[0038] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.
[0039] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0040] Combination Figure 3 As shown, an embodiment of the present disclosure provides a battery electrode, which includes a electrode body 3, a first electrode ear 31 and a second electrode ear 32; the electrode body 3 has an electrode dressing area inside; the first electrode ear 31 is connected to the first side of the electrode body 3; the second electrode ear 32 is connected to the second side of the electrode body 3; wherein the first side and the second side are two adjacent sides of the electrode body 3.
[0041] The battery electrode provided in the embodiment of the present disclosure can be used as a positive electrode or a negative electrode in a battery. Compared with a battery electrode of a traditional structure, the battery electrode is provided with a first electrode ear 31 and a second electrode ear 32 on two adjacent sides of a electrode body 3, respectively. When the electrode body 3 is charged and discharged, the first electrode ear 31 and the second electrode ear 32 can cooperate in current diversion. Even under high-rate fully charged conditions, the actual overcurrent in the first electrode ear 31 and the second electrode ear 32 will not exceed the rated safety value, thereby effectively avoiding the problem of heat accumulation and poor heat dissipation performance of the electrode body 3, and greatly improving the safety performance of the battery during high-rate charging and discharging.
[0042] It is also worth noting that the battery electrode can be used as a positive electrode or a negative electrode in a lead-acid battery, or as a positive electrode or a negative electrode in a lithium battery, all of which have the same working principle as mentioned above, which will not be further described here.
[0043] In one embodiment, the pole piece body 3 is configured as a rectangular sheet; the first pole piece ear 31 is connected to a width side of the rectangular sheet with equal width; and the second pole piece ear 32 is vertically connected to a length side of the rectangular sheet.
[0044] Specific, combined Figure 3To further explain in detail, the pole piece body 3 is set as a rectangular piece, and the first pole piece ear 31 is connected to a width side of the rectangular piece with equal width, and the second pole piece ear 32 is vertically connected to a length side of the rectangular piece. In this way, the first pole piece ear 31 with a larger size can be used as the leading electrode ear, and the second pole piece ear 32 with a smaller size can be used as the auxiliary electrode ear. The first pole piece ear 31 can be set to be charged and discharged alone, or the first pole piece ear 31 and the second pole piece ear 32 can be set to be charged and discharged simultaneously.
[0045] Moreover, the first pole piece ear 31 and the second pole piece ear 32 are respectively protruded along two vertical directions on the side of the pole piece body 3, so that the busbar can connect the first pole piece ears 31 and the second pole piece ears 32 in multiple pole piece bodies 3.
[0046] In one possible implementation, the length of the rectangular sheet is recorded as L; the distance between the second pole piece ear 32 and the first pole piece ear 31 is recorded as H, and L / 2<H<3L / 4 is satisfied.
[0047] Specific, combined Figure 3 To further explain in detail, the spacing H between the second pole piece ear 32 and the first pole piece ear 31 is limited to be set to be greater than half the length of the rectangular sheet and less than 3 / 4 of the length of the rectangular sheet. In this way, the second pole piece ear 32 is positioned moderately on the length side of the rectangular sheet, which facilitates more balanced current diversion by the second pole piece ear 32 and facilitates the laying and welding of the busbar of the second pole piece ear 32.
[0048] In addition, the embodiment of the present disclosure also provides a battery electrode stacking assembly, which includes multiple positive electrode sheets 1 and multiple negative electrode sheets 2; the positive electrode sheets 1 and the negative electrode sheets 2 are arranged in an alternating manner; wherein the positive electrode sheet 1 has a first positive electrode ear 11 and a second positive electrode ear 12, and the first positive electrode ear 11 and the second positive electrode ear 12 are respectively connected and arranged on two adjacent sides of the positive electrode sheet 1; the negative electrode sheet 2 has a first negative electrode ear 21 and a second negative electrode ear 22, and the first negative electrode ear 21 and the second negative electrode ear 22 are respectively connected and arranged on two adjacent sides of the negative electrode sheet 2.
[0049] Specific, combined Figure 1 and Figure 2To further explain in detail, the battery electrode stacking assembly includes a plurality of positive electrode sheets 1 and a plurality of negative electrode sheets 2 which are arranged in an interlaced and stacked manner, and a first positive electrode ear 11 and a second positive electrode ear 12 are respectively arranged on two adjacent sides of the positive electrode sheet 1, and a first negative electrode ear 21 and a second negative electrode ear 22 are respectively arranged on two adjacent sides of the negative electrode sheet 2. In this way, when the battery electrode stacking assembly is charged and discharged at a high rate, the first positive electrode ear 11 and the second positive electrode ear 12 can simultaneously conduct the positive electrode sheet 1, and the first negative electrode ear 21 and the second negative electrode ear 22 can simultaneously conduct the negative electrode sheet 2, effectively avoiding the problem of heat accumulation caused by large current being concentrated in a single electrode ear.
[0050] Moreover, the first positive electrode ear 11 and the second positive electrode ear 12 are arranged along two adjacent sides of the positive electrode sheet 1, and the first negative electrode ear 21 and the second negative electrode ear 22 are arranged along two adjacent sides of the negative electrode sheet 2. In this way, during high-rate charging and discharging, the electrochemical reaction rate between the positive electrode sheet 1 and the negative electrode sheet 2 can be better promoted, and the heat dissipation performance and safety performance of high-rate charging and discharging can be ensured. At the same time, the rate of high-rate charging and discharging can be further improved, achieving multiple goals at one stroke.
[0051] In one possible implementation, in a plurality of positive electrode sheets 1 disposed sequentially and spaced apart, a plurality of first positive electrode tabs 11 are disposed in the same direction, and two mutually adjacent second positive electrode tabs 12 are disposed back to back in two opposite directions.
[0052] Specific, combined Figure 1 and 2 To further explain in detail, the multiple first positive ears 11 in the multiple positive electrode sheets 1 are all arranged in the same direction, so that only one bus bar is laid to conveniently and stably weld and fix the multiple first positive ears 11 in the same direction; the two adjacent second positive ears 12 are respectively arranged back to back in two opposite directions, so that the multiple second positive ears 12 in the multiple positive electrode sheets 1 will be divided into two rows along two directions, so that two bus bars can be laid correspondingly to connect the multiple second positive ears 12 respectively, and the spacing between the two adjacent second positive ears 12 in the thickness direction of the positive electrode sheet 1 will be staggered and enlarged, which can also produce a beneficial effect of heat dissipation and cooling of the second positive ears 12.
[0053] In one embodiment, in a plurality of negative electrode sheets 2 disposed sequentially and spaced apart from each other, a plurality of first negative electrode tabs 21 are disposed in the same direction, and two adjacent second negative electrode tabs 22 are disposed back to back in two opposite directions.
[0054] Similarly, combined Figure 1 and 2To further explain in detail, the multiple first negative electrode ears 21 in the multiple negative electrode sheets 2 are all arranged in the same direction, so that only one bus bar is laid to conveniently and stably weld and fix the multiple first negative electrode ears 21 in the same direction; the two adjacent second negative electrode ears 22 are respectively arranged back to back in two opposite directions, so that the multiple second negative electrode ears 22 in the multiple negative electrode sheets 2 will be divided into two rows along two directions, so that two bus bars can be laid correspondingly to connect the multiple second negative electrode ears 22 respectively, and the spacing between the two adjacent second negative electrode ears 22 in the thickness direction of the negative electrode sheet 2 will be staggered and enlarged, which can also produce a beneficial effect of heat dissipation and cooling of the second negative electrode ears 22.
[0055] In one embodiment, the plurality of first positive electrode tabs 11 and the plurality of first negative electrode tabs 21 are disposed back to back in two opposite directions.
[0056] Specific, combined Figure 1 and 2 To further explain in detail, the multiple first positive pole ears 11 and the multiple first negative pole ears 21 are arranged back to back in two opposite directions, so that the multiple first positive pole ears 11 can be welded to the bus bars in one direction, and the multiple first negative pole ears 21 can be welded to the bus bars in another parallel direction, so that the bus bars of the two can be welded separately without affecting each other.
[0057] In one embodiment, the adjacent second positive electrode tab 12 and the adjacent second negative electrode tab 22 are disposed back to back in two opposite directions.
[0058] Specific, combined Figure 1 and 2 To further explain in detail, the adjacent second positive tabs 12 and second negative tabs 22 are arranged back to back in two opposite directions, so that welding busbars of multiple second positive tabs 12 and welding busbars of multiple second negative tabs 22 can be performed separately without affecting each other.
[0059] In one possible implementation manner, the positive electrode sheet 1 and the negative electrode sheet 2 are respectively of equal width and length and are completely overlapped.
[0060] Specific, combined Figure 1 and Figure 2 To further explain in detail, the positive electrode sheet 1 and the negative electrode sheet 2 are respectively arranged with equal width and length and completely overlapped, which can maximize the contact area between the positive electrode sheet 1 and the negative electrode sheet 2, improve the electrochemical reaction efficiency during charging and discharging of the two, and also make the structure of the battery electrode stacking assembly more compact and maximize the energy density.
[0061] In addition, an embodiment of the present disclosure further provides a battery, which includes a battery package and the above-mentioned battery electrode stacking assembly; wherein, at least one of the above-mentioned battery electrode stacking assemblies is arranged in the battery package.
[0062] The battery includes the above-mentioned battery pole piece stacking assembly, which can achieve all its beneficial effects and will not be described in detail here.
[0063] In addition, since at least one of the above-mentioned battery electrode stacking assemblies is provided in the battery package of the battery, when the battery package of the battery also has other battery electrodes of conventional structure, if conventional rate charging and discharging are required, battery electrodes of conventional structure can be used for charging and discharging; if high-rate charging and discharging are required, the above-mentioned battery electrode stacking assembly can be used for high-rate rapid full charging, so as to ensure that the battery can adapt to different charging and discharging conditions and can maintain excellent heat dissipation performance.
[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0065] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. A battery pole piece, characterized in that: include; The electrode body (3) has an electrode dressing area inside; A first pole piece ear (31) connected to a first side of the pole piece body (3); A second pole piece ear (32) connected to a second side of the pole piece body (3); Wherein, the first side and the second side are two adjacent sides of the pole piece body (3).
2. The battery electrode according to claim 1, characterized in that: The pole piece body (3) is configured as a rectangular sheet; The first pole piece ear (31) is connected to a width side of the rectangular sheet body with equal width; The second pole piece ear (32) is vertically connected to a length side of the rectangular sheet body.
3. The battery pole piece according to claim 2, characterized in that: The length of the rectangular sheet is denoted as L; The distance between the second pole piece ear (32) and the first pole piece ear (31) is denoted as H, and satisfies L / 2<H<3L / 4.
4. A battery pole piece stacking assembly, characterized in that: A plurality of battery pole pieces comprising any one of claims 1 to 3; The plurality of battery pole pieces respectively include a positive pole piece (1) and a plurality of negative pole pieces (2) which are alternately stacked. The positive electrode sheet (1) comprises a first positive electrode ear (11) and a second positive electrode ear (12), and the first positive electrode ear (11) and the second positive electrode ear (12) are respectively connected and arranged on two adjacent sides of the positive electrode sheet (1); The negative electrode sheet (2) comprises a first negative electrode ear (21) and a second negative electrode ear (22), and the first negative electrode ear (21) and the second negative electrode ear (22) are respectively connected and arranged on two adjacent sides of the negative electrode sheet (2).
5. The battery pole piece stacking assembly according to claim 4, characterized in that: In the plurality of positive electrode sheets (1) arranged in sequence and spaced apart, the plurality of the first positive electrode tabs (11) are arranged in the same direction, and two adjacent second positive electrode tabs (12) are arranged back to back in two opposite directions.
6. The battery pole piece stacking assembly according to claim 5, characterized in that: In the plurality of negative electrode sheets (2) arranged in sequence and spaced apart, the plurality of the first negative electrode ears (21) are arranged in the same direction, and two adjacent second negative electrode ears (22) are arranged back to back in two opposite directions.
7. The battery pole piece stacking assembly according to claim 6, characterized in that: The plurality of first positive electrode tabs (11) and the plurality of first negative electrode tabs (21) are arranged back to back in two opposite directions.
8. The battery pole piece stacking assembly according to claim 6, characterized in that: The adjacent second positive electrode lug (12) and the second negative electrode lug (22) are arranged back to back in two opposite directions.
9. The battery pole piece stacking assembly according to claim 6, characterized in that: The positive electrode sheet (1) and the negative electrode sheet (2) are respectively of equal width and length and are arranged to completely overlap.
10. A battery, characterized in that: A battery pack comprising a battery pack and a battery pole piece stacking assembly as described in any one of claims 4 to 9; Wherein, at least one battery electrode stacking assembly is arranged in the battery package.