Battery and battery pack
By employing a centrally symmetrical structural design and multi-path current cycling in the battery, the problem of increased impedance caused by the extension of the current path in large-size batteries is solved, achieving uniform current density, improving the battery's overcurrent capacity and energy efficiency, and extending its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNGROW POWER SUPPLY CO LTD
- Filing Date
- 2025-03-28
- Publication Date
- 2026-05-01
AI Technical Summary
As battery size increases, the current transmission path lengthens, leading to increased impedance, reduced overcurrent capacity and energy efficiency, and increased heat generation, which affects lifespan.
The battery employs a centrally symmetrical structural design with multiple tabs and terminals, enabling multi-path circulation of the current path, shortening the current path, and uniformly distributing the current density through the symmetrical layout of the tabs and terminals, thereby reducing ohmic impedance.
It effectively shortens the current path, reduces battery heat generation, improves overcurrent capacity and energy efficiency, and extends battery life.
Smart Images
Figure CN224191189U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of batteries, and more particularly to a battery and a battery pack. Background Technology
[0002] With the continuous development of new energy technologies, batteries are becoming larger and longer in order to improve energy density and reduce costs.
[0003] However, as battery size increases, so does the current transmission path, which leads to increased impedance and reduces the battery's overcurrent capacity and energy efficiency.
[0004] Application content
[0005] This application provides a battery and battery pack that reduces the internal impedance of the battery while maintaining its overcurrent capacity and energy efficiency in a large-size configuration.
[0006] This application provides a battery having a first direction and a second direction. The battery includes: a casing, a first cover plate, and a second cover plate. The casing has a receiving cavity with openings at both ends in the first direction. The first cover plate and the second cover plate are respectively connected to the openings at both ends of the casing to seal the receiving cavity. An electrode core is disposed in the receiving cavity and includes an electrode core body, a first positive electrode tab, a first negative electrode tab, a second positive electrode tab, and a second negative electrode tab. The first positive electrode tab and the first negative electrode tab are connected to the end of the electrode core body facing the first cover plate and are spaced apart along the second direction. The second negative electrode tab and the second positive electrode tab are connected to the end of the electrode core body facing the second cover plate and are spaced apart along the second direction. A first negative electrode post and a first positive electrode post are disposed on the first cover plate and are sequentially disposed along the second direction Y. A second positive electrode post and a second negative electrode post are disposed on the second cover plate and are sequentially disposed along the second direction Y.
[0007] In this embodiment, the first positive tab and the first negative tab form a first current path, while the first positive tab and the second negative tab form a second current path; the second positive tab and the second negative tab form a third current path, and the second positive tab and the first negative tab form a fourth current path. This allows a portion of the electrons within the core to flow through the first and third current paths, achieving multi-path circulation of the current path, effectively shortening the current path, reducing the ohmic resistance of the current flow, thereby reducing battery heat generation and improving the overcurrent capacity and energy efficiency of large-size batteries. It is understood that in batteries of related technologies, a positive tab is generally provided at one end of the core body along its length, and a negative tab at the other end. The current path is from the positive tab to the negative tab. Since an increase in the size of the core body usually manifests as an increase in length, this leads to an increase in the current path. A longer current path leads to an increase in ohmic resistance, reducing the battery's overcurrent capacity and energy efficiency, and increasing heat generation, thus affecting its lifespan. In this application, by providing a first positive tab and a first negative tab at one end of the electrode core body, an independent and shorter current path is formed at one end of the battery, thereby improving the above-mentioned defects.
[0008] As one optional embodiment of this application, the first positive electrode tab and the second positive electrode tab are arranged symmetrically about the center of the electrode core body, and the first negative electrode tab and the second negative electrode tab are arranged symmetrically about the center of the electrode core body. 。
[0009] In this embodiment, the centrally symmetrical design of the first and second positive tabs, and the first and second negative tabs, about the core body allows for more uniform current flow and density, thereby reducing heat generation and improving lifespan and performance. It is understood that due to the characteristics of battery materials, the ohmic impedance of the positive electrode is generally greater than that of the negative electrode, resulting in a higher current density at the positive electrode and a current diffusion mechanism from the positive to the negative electrode. In this case, due to the centrally symmetrical design, the current can diffuse from the first positive tab towards the first negative tab at one end of the core body, and also from the first positive tab towards the second negative tab. This results in more directions of current diffusion and a more uniform current density, further reducing battery heat generation and improving battery life.
[0010] As one optional embodiment of this application, the first positive electrode post and the second positive electrode post are arranged in a centrally symmetrical manner about the center of the electrode core body, and the first negative electrode post and the second negative electrode post are arranged in a centrally symmetrical manner about the center of the electrode core body.
[0011] To achieve the above technical solution, the first positive terminal and the first negative terminal correspond to the first positive terminal and the first negative terminal, respectively, and the second positive terminal and the second negative terminal correspond to the second positive terminal and the second negative terminal, respectively, thereby better adapting to the structural design of the electrode core, ensuring the overcurrent intensity and current uniformity, and improving service life.
[0012] As one of the optional embodiments of this application, the electrode core body has a center line extending along a first direction and passing through the center of the electrode core body, the first positive electrode tab and the second negative electrode tab are disposed on the same side of the center line, and the first negative electrode tab and the second positive electrode tab are disposed on the other side of the center line.
[0013] In this embodiment, the first positive tab and the first negative tab are disposed on both sides of the center line, and the second positive tab and the second negative tab are disposed on both sides of the center line. This improves the uniformity of the tab layout on the basis of achieving a centrally symmetrical structure, thereby further improving the uniformity of the current.
[0014] As one of the optional embodiments of this application, the distance between the first positive electrode tab and the center line is H1, and the distance between the first negative electrode tab and the center line is H2, satisfying H1 = H2.
[0015] As one of the optional embodiments of this application, the electrode core body has a first side and a second side located on both sides of the center line. The first side and the first positive electrode tab are located on the same side of the center line, and the distance between the first positive electrode tab and the first side is L1, satisfying H1=L1.
[0016] In this embodiment, the center line divides the electrode core body into two regions. The first positive electrode tab is located at the center of one region, and the first negative electrode tab is located at the center of the other region. In this way, the positions of the first positive electrode tab and the first negative electrode tab are more uniform, the current flow is more uniform, thereby reducing heat concentration and making the heat at the end region of the battery more uniform, thus ensuring the battery life.
[0017] As one of the optional embodiments of this application, it further includes an injection hole and a sealing pin, wherein the injection hole extends through the first cover plate in a first direction, and the sealing pin is connected to the injection hole to seal the injection hole.
[0018] As one of the optional embodiments of this application, it also includes an explosion-proof hole and an explosion-proof valve, wherein the explosion-proof hole extends through the second cover plate in a first direction, and the explosion-proof valve is connected to the explosion-proof hole to seal the explosion-proof hole.
[0019] As one of the optional embodiments of this application, it further includes a connecting piece connected between at least one of the following combinations: a first positive tab and a first positive post, a first negative tab and a first negative post, a second positive tab and a second positive post, and a second negative tab and a second negative post.
[0020] This application also provides a battery pack, comprising: a plurality of the above-described batteries, wherein the plurality of batteries are connected in series and / or in parallel.
[0021] One of the above technical solutions has the following advantages or beneficial effects:
[0022] 1. The first positive and first negative tabs form a first current path, while the first positive and second negative tabs form a second current path; the second positive and second negative tabs form a third current path, and the second positive tab and the first negative tab form a fourth current path. This allows some electrons within the core to flow through the first and third current paths, achieving multi-path circulation of the current path, effectively shortening the current path, reducing the ohmic resistance of the current flow, thereby reducing battery heat generation and improving the overcurrent capacity and energy efficiency of large-size batteries. Understandably, in batteries of related technologies, a positive tab is typically placed at one end of the core's length, and a negative tab at the other end, with the current path flowing from the positive tab to the negative tab. Since an increase in the size of the core usually manifests as an increase in length, this leads to an increase in the current path. A longer current path results in increased ohmic resistance, reducing the battery's overcurrent capacity and energy efficiency, and also increasing heat generation, affecting lifespan. In this application, by providing a first positive tab and a first negative tab at one end of the electrode core body, an independent and shorter current path is formed at one end of the battery, thereby improving the above-mentioned defects.
[0023] 2. Due to the centrally symmetrical structural design of the first and second positive tabs, and the first and second negative tabs, about the core body, the current flow is more evenly distributed and the current density is more uniform, thereby reducing heat generation and improving lifespan and performance. It is understandable that due to the characteristics of battery materials, the ohmic impedance of the positive electrode is generally greater than that of the negative electrode, resulting in a higher current density at the positive electrode and a mechanism for current diffusion from the positive to the negative electrode. In this case, due to the centrally symmetrical structural design, the current can diffuse from the first positive tab to the first negative tab at one end of the core body, and also from the first positive tab to the second negative tab. This results in more directions of current diffusion and a more uniform current density, further reducing battery heat generation and improving battery life. Attached Figure Description
[0024] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.
[0025] Figure 1 This is an overall cross-sectional view of the battery provided in the embodiments of this application;
[0026] Figure 2 This is a cross-sectional view provided in an embodiment of this application to represent the shell structure;
[0027] Figure 3 This is a schematic diagram provided in an embodiment of this application to illustrate the core structure;
[0028] Figure 4 This is a schematic diagram provided in an embodiment of this application to represent the current flow path;
[0029] Figure 5 This is a structural diagram provided in this application to represent the positive electrode and the negative electrode;
[0030] Figure 6 This is an overall cross-sectional view of a battery provided in another embodiment of this application;
[0031] Figure 7 This is a schematic diagram of the current flow path in a battery provided in another embodiment of this application.
[0032] Reference numerals: 11, housing; 12, first cover plate; 13, second cover plate; 10, receiving cavity; 100, opening; 1a, centerline;
[0033] 2. Electrode core; 21. Electrode core body; 221. First positive electrode tab; 222. First negative electrode tab; 231. Second positive electrode tab; 232. Second negative electrode tab; 2a. First side; 2b. Second side;
[0034] 321, First positive terminal; 322, First negative terminal; 331, Second positive terminal; 332, Second negative terminal;
[0035] 41. Injection hole; 42. Sealing pin; 51. Explosion-proof hole; 52. Explosion-proof valve;
[0036] 6. Connecting piece;
[0037] 200, Positive electrode plate; 201, First positive monopole; 202, Second positive monopole; 300, Negative electrode plate; 301, First negative monopole; 302, Second negative monopole;
[0038] X, the first direction; Y, the second direction. Detailed Implementation
[0039] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.
[0041] The following is in conjunction with the appendix Figure 1-7 This application will be further described below.
[0042] Reference Figure 1 This application provides a battery having a first direction X and a second direction Y. In some examples, the first direction X and the second direction Y are perpendicular to each other, and respectively refer to the length direction and width direction of the battery.
[0043] The battery includes a casing 11, a first cover plate 12 and a second cover plate 13, and an electrode core 2. The casing 11 has a receiving cavity 10, and the electrode core 2 is disposed in the receiving cavity 10.
[0044] Reference Figure 2 The housing 11 is rectangular, and the aforementioned receiving cavity 10 is formed inside the housing 11. The receiving cavity 10 has openings 100 at both ends in the first direction X. The first cover plate 12 and the second cover plate 13 are respectively connected to the openings 100 at both ends of the housing 11 to cover the receiving cavity 10. In some examples, the first cover plate 12 and the second cover plate 13 are respectively welded to the peripheral edges of the openings 100 at both ends of the housing 11.
[0045] Reference Figure 3 For electrode core 2, electrode core 2 includes electrode core body 21, first positive electrode tab 221, first negative electrode tab 222, second positive electrode tab 231, and second negative electrode tab 232. The first negative electrode tab 222 and the first positive electrode tab 221 are connected to the end of electrode core body 21 facing the first cover plate 12 and are spaced apart along the second direction Y. The second positive electrode tab 231 and the second negative electrode tab 232 are connected to the end of electrode core body 21 facing the second cover plate 13 and are spaced apart along the second direction Y. The first positive electrode tab 221 and the second positive electrode tab 231 are centrally symmetrical about the center of electrode core body 21, and the first negative electrode tab 222 and the second negative electrode tab 232 are centrally symmetrical about the center of electrode core body 21.
[0046] In some examples, the electrode core 2 is formed from a positive electrode 200, a negative electrode 300, and a separator through a lamination and / or winding process. When the electrode core 2 is formed by winding, the position and size of the tabs should be designed to ensure the accuracy of each tab's position. When the electrode core 2 is formed by lamination, refer to... Figure 5The positive electrode 200 has a first positive monopole 201 at one end in the first direction X and a second positive monopole 202 at the other end, and the first positive monopole 201 and the second positive monopole 202 are centrally symmetrical about the positive electrode 200. Similarly, the negative electrode 300 has a first negative monopole 301 at one end in the first direction X and a second negative monopole 302 at the other end, and the first negative monopole 301 and the second negative monopole 302 are centrally symmetrical about the negative electrode 300.
[0047] The positive electrode 200, separator, negative electrode 300, and separator are stacked sequentially. The first positive monopole 201 of multiple positive electrode 200s stacked together forms the first positive monopole 221 in this case, and the second positive monopole 202 of multiple positive electrode 200s stacked together forms the second positive monopole 231 in this case. Similarly, the first negative monopole 301 of multiple negative electrode 300s stacked together forms the first negative monopole 222 in this case, and the second negative monopole 302 of multiple negative electrode 300s stacked together forms the second negative monopole 232 in this case.
[0048] In the embodiments of this application, firstly, referring to Figure 4 The first positive tab 221 and the first negative tab 222 form a first current path, and the first positive tab 221 and the second negative tab 232 form a second current path; the second positive tab 231 and the second negative tab 232 form a third current path, and the second positive tab 231 and the first negative tab 222 form a fourth current path. This allows some electrons within the electrode core 21 to flow through the shorter first and third current paths, effectively shortening the current path, reducing the ohmic resistance of the current flow, thereby reducing the heat generation of the battery and improving the overcurrent capacity and energy efficiency of large-size batteries.
[0049] Understandably, in batteries of related technologies, a positive tab is typically located at one end of the core body 21 along its length, and a negative tab at the other end. The current path is from the positive tab to the negative tab. Since an increase in the size of the core body 21 usually manifests as an increase in length, this leads to an increase in the current path, resulting in increased ohmic resistance, increased heat generation, reduced battery overcurrent capacity and energy efficiency, and impacted lifespan. However, in this application, by providing a first positive tab 221 and a first negative tab 222 at one end of the core body 21, a shorter and independent current path is formed at one end of the battery, thereby effectively improving the aforementioned drawbacks.
[0050] Secondly, the centrally symmetrical design of the first positive electrode 221 and the second positive electrode 231, and the first negative electrode 222 and the second negative electrode 232, with respect to the electrode core body 21, allows for more uniform current flow and density, thereby reducing heat generation and improving service life and performance. It is understood that the centrally symmetrical design has at least two advantages. First, the centrally symmetrical design places the first positive electrode 221 and the second negative electrode 232 on an extension line parallel to the first direction X, and the first negative electrode 222 and the second positive electrode 231 on an extension line parallel to the first direction X. This means the second current path and the fourth current path are relatively parallel, which effectively reduces the impact of electron flow. Second: Due to the material properties of the battery, the ohmic impedance of the positive electrode is generally greater than that of the negative electrode. This results in a greater current density at the positive electrode than at the negative electrode, thus the current has a mechanism of diffusion from the positive electrode to the negative electrode. In this case, due to the centrally symmetrical structural design, the current can diffuse from the first positive electrode tab 221 to the first negative electrode tab 222 at one end of the electrode core body 21, and can also diffuse from the first positive electrode tab 221 to the second negative electrode tab 232. This results in more directions of current diffusion and a more uniform current density, which can further reduce the heat generated by the battery and improve the battery life.
[0051] Back Figure 3 As one of the optional embodiments of this application, the electrode core body 21 has a center line 1a extending along the first direction X and passing through the center of the electrode core body 21, the first positive electrode tab 221 and the second negative electrode tab 232 are disposed on the same side of the center line 1a, and the first negative electrode tab 222 and the second positive electrode tab 231 are disposed on the other side of the center line 1a.
[0052] In this embodiment, the first positive electrode 221 and the first negative electrode 222 are disposed on both sides of the center line 1a, and the second positive electrode 231 and the second negative electrode 232 are disposed on both sides of the center line 1a. This improves the uniformity of the electrode layout on the basis of achieving a centrally symmetrical structure, thereby further improving the uniformity of the current.
[0053] As one of the optional embodiments of this application, the distance between the first positive electrode tab 221 and the center line 1a is H1, and the distance between the first negative electrode tab 222 and the center line 1a is H2, satisfying H1=H2.
[0054] As one of the optional embodiments of this application, the core body 21 has a first side 2a and a second side 2b located on both sides of the center line 1a. The first side 2a and the first positive electrode tab 221 are located on the same side of the center line 1a, and the distance between the first positive electrode tab 221 and the first side 2a is L1, satisfying H1=L1.
[0055] In this embodiment, the center line 1a divides the electrode core body 21 into two regions. The first positive electrode tab 221 is located at the center of one region, and the first negative electrode tab 222 is located at the center of the other region. In this way, the positions of the first positive electrode tab 221 and the first negative electrode tab 222 are more uniform, the current flow is more uniform, thereby reducing heat concentration and making the heat at the end region of the battery more uniform, thus ensuring the battery life.
[0056] As one of the optional embodiments of this application, it further includes a first positive terminal 321, a first negative terminal 322, a second positive terminal 331 and a second negative terminal 332, with the first positive terminal 321 and the first negative terminal 322 disposed on the first cover plate 12, and the second positive terminal 331 and the second negative terminal 332 disposed on the second cover plate 13.
[0057] In some examples, the first negative terminal 322 and the first positive terminal 321 are arranged sequentially along the second direction Y, and the second positive terminal 331 and the second negative terminal 332 are arranged sequentially along the second direction Y. The first positive terminal 321 and the second positive terminal 331 are arranged symmetrically about the center of the electrode core body 21, and the first negative terminal 322 and the second negative terminal 332 are arranged symmetrically about the center of the electrode core body 21. The first positive terminal 321 is electrically connected to the first positive terminal tab 221, the first negative terminal 322 is electrically connected to the first negative terminal tab 222, the second positive terminal 331 is electrically connected to the second positive terminal tab 231, and the second negative terminal 332 is electrically connected to the second negative terminal tab 232.
[0058] To achieve the above technical solution, the first positive terminal 321 and the first negative terminal 322 correspond to the first positive terminal 221 and the first negative terminal 222, respectively, and the second positive terminal 331 and the second negative terminal 332 correspond to the second positive terminal 231 and the second negative terminal 232, respectively, thereby better adapting to the structural design of the electrode core 2, ensuring the overcurrent intensity and current uniformity, and improving the service life.
[0059] It should be noted that, in the above context, the first positive terminal 321 refers to both an electrical connection between the first positive terminal 321 and the first positive tab 221, and that the first positive terminal 321 and the first positive tab 221 are on the same straight line parallel to the first direction X. Similarly, this ensures that the structure of the terminal matches the design of the tab, thereby guaranteeing battery performance.
[0060] Back Figure 1 and Figure 2As one optional embodiment of this application, it further includes an injection hole 41 and a sealing pin 42. The injection hole 41 penetrates the first cover plate 12 along the first direction X, and the sealing pin 42 is connected to the injection hole 41 to seal the injection hole 41. In some examples, the sealing pin 42 is welded inside the injection hole 41 to achieve a seal on the injection hole 41. It is understood that the injection hole 41 is a channel for injecting electrolyte into the accommodating cavity 10 during the battery production stage, and the sealing pin 42 is used to seal the injection hole 41 after the electrolyte injection is completed.
[0061] As one optional embodiment of this application, it further includes an explosion-proof hole 51 and an explosion-proof valve 52. The explosion-proof hole 51 penetrates the second cover plate 13 along the first direction X, and the explosion-proof valve 52 is connected to the explosion-proof hole 51 to seal the explosion-proof hole 51. It is understood that when the internal pressure of the battery is too high, the gas can break through the explosion-proof valve 52 and be discharged smoothly, thereby reducing the risk of battery thermal runaway. In some examples, the explosion-proof valve 52 is made of plate-shaped aluminum material, and a weak part is provided on the explosion-proof valve 52. For example, optionally, a notch or indentation is provided on the explosion-proof valve 52.
[0062] As one optional embodiment of this application, a connecting piece 6 is also included, connecting at least one of the following combinations: a first positive tab 221 and a first positive terminal 321, a first negative tab 222 and a first negative terminal 322, a second positive tab 231 and a second positive terminal 331, and a second negative tab 232 and a second negative terminal 332. In some examples, the connecting piece 6 is provided between all four combinations. It is understood that the connecting piece 6 serves as a relay for the electrical connection between the first positive tab 221 and the first positive terminal 321 to facilitate soldering operations. In some examples, the connecting piece 6 is made of copper sheet, with one end of the connecting piece 6 soldered to the tab and the other end of the connecting piece 6 soldered to the terminal.
[0063] Reference Figure 6 and Figure 7 In some alternative embodiments, the battery can also be in other forms. The aforementioned first direction X and second direction Y refer to the width and length directions of the battery, respectively. In this way, multiple current paths can be formed, wherein the second and fourth current paths are shorter, and the current flow area is more uniform and dispersed, thereby ensuring battery performance.
[0064] This application also provides a battery pack, comprising: a plurality of the above-described batteries, wherein the plurality of batteries are connected in series and / or in parallel.
[0065] The above description is only a partial implementation of the embodiments of this application and is not intended to limit the application in any way. The protection scope of the embodiments of this application is not limited thereto. Any simple modifications, equivalent changes and alterations that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of this application should be included within the protection scope of the embodiments of this application.
Claims
1. A battery, characterized in that, Having a first orientation and a second orientation, the battery comprises: The housing includes a first cover plate and a second cover plate. The housing has a receiving cavity with openings at both ends in the first direction. The first cover plate and the second cover plate are respectively connected to the openings at both ends of the housing to cover the receiving cavity. An electrode core, disposed in the accommodating cavity, includes an electrode core body, a first positive electrode tab, a first negative electrode tab, a second positive electrode tab, and a second negative electrode tab. The first negative electrode tab and the first positive electrode tab are connected to one end of the electrode core body facing the first cover plate and are spaced apart along the second direction. The second positive electrode tab and the second negative electrode tab are connected to one end of the electrode core body facing the second cover plate and are spaced apart along the second direction. The first negative terminal and the first positive terminal are disposed on the first cover plate and arranged sequentially along the second direction; The second positive terminal and the second negative terminal are disposed on the second cover plate and arranged sequentially along the second direction.
2. The battery as described in claim 1, characterized in that, The first positive electrode tab and the second positive electrode tab are arranged symmetrically about the center of the electrode core body, and the first negative electrode tab and the second negative electrode tab are arranged symmetrically about the center of the electrode core body.
3. The battery as described in claim 2, characterized in that, The first positive terminal and the second positive terminal are arranged symmetrically about the center of the electrode core body, and the first negative terminal and the second negative terminal are arranged symmetrically about the center of the electrode core body.
4. The battery as described in claim 1, characterized in that, The electrode core body has a center line extending along the first direction and passing through the center of the electrode core body. The first positive electrode tab and the second negative electrode tab are disposed on the same side of the center line, and the first negative electrode tab and the second positive electrode tab are disposed on the other side of the center line.
5. The battery as described in claim 4, characterized in that, The distance between the first positive electrode tab and the center line is H1, and the distance between the first negative electrode tab and the center line is H2, satisfying H1 = H2.
6. The battery as described in claim 5, characterized in that, The electrode core body has a first side and a second side located on both sides of the center line. The first side and the first positive electrode tab are located on the same side of the center line. The distance between the first positive electrode tab and the first side is L1, which satisfies H1 = L1.
7. The battery as described in claim 1, characterized in that, It also includes an injection hole and a sealing pin, wherein the injection hole extends through the first cover plate along the first direction, and the sealing pin is connected to the injection hole to seal the injection hole.
8. The battery as described in claim 1, characterized in that, It also includes an explosion-proof hole and an explosion-proof valve, wherein the explosion-proof hole extends through the second cover plate along the first direction, and the explosion-proof valve is connected to the explosion-proof hole to seal the explosion-proof hole.
9. The battery as described in claim 1 or 6, characterized in that, It also includes a connecting piece that connects to at least one of the following combinations: the first positive tab and the first positive post, the first negative tab and the first negative post, the second positive tab and the second positive post, and the second negative tab and the second negative post.
10. A battery pack, characterized in that, include: Multiple batteries as described in any one of claims 1-9, wherein the multiple batteries are connected in series and / or in parallel.