Pole adapter, single battery and high-capacity battery

Abstract

The utility model provides a pole adapter, a single battery and a high-capacity battery, and mainly solves the problem that the normal operation of the battery module is influenced by over-high heat at the pole position of the single battery in the existing battery module. The pole adapter comprises a first electric connection main body and a second electric connection main body, the first electric connection main body is provided with a mounting hole used for being connected with a single battery pole; the second electric connection main body is provided with a heat exchange channel for transmitting a heat exchange medium; at least one of the first electric connection main body and the second electric connection main body is provided with an electric connection area. The pole adapter not only has an electric connection function, but also has relatively high heat exchange efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of battery temperature control, specifically relating to a terminal adapter, a single cell, and a large-capacity battery. Background Technology

[0002] Currently, common battery modules (also known as battery packs) are composed of multiple individual cells (which are generally cylindrical or square) connected together in series, parallel, or a combination of series and parallel connections.

[0003] Temperature control of battery modules has always been a hot topic in this field. Most existing battery modules use air cooling or liquid cooling to control the temperature of the entire battery module. However, since the terminal posts of individual cells are the parts with the most concentrated heat in the battery module, when the local heat of the terminal posts is too high, it will also cause the temperature of the electrical connectors connected to them to rise rapidly, affecting the normal operation of the battery module. Summary of the Invention

[0004] To address the problem of excessive heat at the terminal positions of individual cells in existing battery modules affecting the normal operation of the battery module, this utility model provides a terminal adapter, an individual cell, and a large-capacity battery.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An electrode adapter includes a first electrical connection body and a second electrical connection body arranged along the y-direction; the first electrical connection body has a mounting hole for connecting to the electrode of a single battery cell, the mounting hole being arranged along the height direction of the first electrical connection body; the second electrical connection body has a heat exchange channel for transmitting a heat exchange medium, the heat exchange channel being extending along the x-direction; at least one of the first electrical connection body and the second electrical connection body has an electrical connection area to realize electrical connection between adjacent single batteries.

[0007] Furthermore, the first electrical connection body and the second electrical connection body are integrally extruded.

[0008] Furthermore, the heat exchange channel has an elliptical or circular cross-section.

[0009] Furthermore, the heat exchange channel is provided with multiple heat-conducting ribs to increase the heat exchange area. Each heat-conducting rib extends along the x-direction and is evenly distributed along the circumference of the heat exchange channel.

[0010] Furthermore, the mounting hole is a blind hole with a flat bottom, used to connect to the terminal post of a single battery cell by welding. A through hole is opened at the bottom of the blind hole, and the diameter of the through hole is smaller than the diameter of the blind hole.

[0011] Furthermore, the bottom of the first electrical connection body is provided with a protrusion for increasing the contact area with the terminal post of the single battery cell, the blind hole extends to the protrusion, and the through hole passes through the protrusion.

[0012] This utility model also provides a single battery cell, which includes a battery casing and an electrode assembly and an electrolyte located inside the battery casing; the battery casing is formed by an upper cover assembly, a cylindrical body and a lower cover assembly; the upper cover assembly includes a cover plate and an electrode post that is insulated and fixed on the cover plate, the electrode post including a positive electrode post and a negative electrode post; an electrode post adapter is fixedly installed on both the positive electrode post and the negative electrode post.

[0013] This utility model also provides a high-capacity battery, which includes multiple individual cells and a connecting tube assembly; the multiple individual cells are arranged in sequence; the connecting tube assembly includes multiple sub-connecting tubes, and the two ends of each sub-connecting tube are respectively connected to the heat exchange channels on the adjacent individual cell terminal adapter, thereby connecting the heat exchange channels on the adjacent individual cell terminal adapter.

[0014] Furthermore, the sub-connecting pipes are flexible hoses, and each sub-connecting pipe is connected to the heat exchange channel by adhesive bonding.

[0015] Furthermore, it also includes a housing, in which multiple individual cells are arranged along the x-direction in the inner cavity of the housing; the housing has at least one shared chamber, the inner cavity of the shared chamber is connected to the inner cavity of all individual cells; the top plate of the housing has clearance holes for the terminals of each individual cell; each individual cell terminal extends out of the clearance hole, and the area of ​​the top plate of the housing corresponding to the clearance hole is fixedly sealed to the individual cell housing.

[0016] Furthermore, an insulating sealant layer is laid on the top of the outer casing, which wraps around each sub-connecting pipe and the pole adapter. At the same time, the electrical connection area of ​​the pole adapter is exposed by the insulating sealant layer.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This utility model's electrode adapter includes a first electrical connection body and a second electrical connection body. The first electrical connection body has mounting holes for connecting to the terminals of individual battery cells, enabling reliable electrical connection between the electrode adapter and each individual battery cell terminal. The second electrical connection body has heat exchange channels for transmitting heat exchange medium, solving the problem of excessively high local temperatures in the terminals of individual battery cells. The mounting holes and heat exchange channels are located on different electrical connection bodies, making their fabrication easier. Furthermore, the different locations of the mounting holes and heat exchange channels facilitate the connection between the electrode adapter and the individual battery cells, and also facilitate the connection of heat exchange channels between adjacent individual battery cells, making the assembly of large-capacity batteries more convenient. In addition, at least one of the first and second electrical connection bodies has an electrical connection area. The selection of multiple electrical connection areas allows for various methods to achieve electrical connection between adjacent individual battery cells, making the connection between adjacent individual battery cells more convenient.

[0019] 2. In this utility model of pole adapter, the mounting hole and heat exchange channel are set on different electrical connection bodies, so that the first electrical connection body and the second electrical connection body can be integrally extruded and molded, resulting in lower manufacturing costs. At the same time, during subsequent processing, only the mounting hole needs to be processed once, resulting in lower machining costs and further reducing the processing and manufacturing costs.

[0020] 3. In the electrode adapter of this utility model, the cross-section of the heat exchange channel is elliptical or circular. A circular heat exchange channel is more convenient to connect with the sub-connecting pipe. Designing the cross-section of the heat exchange channel as an elliptical hole can reduce the overall height of the electrode adapter, thereby reducing the height of the entire high-capacity battery.

[0021] 4. In this utility model of the electrode adapter, multiple heat-conducting ribs are provided in the heat exchange channel to increase the heat exchange area. These ribs increase the contact area between the heat exchange medium and the electrode adapter, thereby increasing the heat exchange area and further improving the heat exchange effect. Simultaneously, the multiple heat-conducting ribs are evenly distributed circumferentially along the heat exchange channel, resulting in good temperature uniformity across the electrode adapter. Each heat-conducting rib extends axially along the heat exchange channel, without affecting the flow of the heat exchange medium within the channel.

[0022] 5. In this utility model of the electrode adapter, the mounting hole is a blind hole with a flat bottom. It is connected to the single-cell battery electrode by welding, which improves the connection strength and reliability between the electrode adapter and the electrode. At the same time, a through hole is opened at the bottom of the blind hole, which can eliminate welding stress and improve the reliability of welding between the electrode adapter and the single-cell battery electrode.

[0023] 6. In the electrode adapter of this utility model, the bottom of the first electrical connection body is provided with a protrusion for increasing the contact area with the electrode of the single battery cell. The protrusion is embedded in the groove of the electrode of the single battery cell, so that the first electrical connection body can make close contact with the electrode, ensuring the electrical connection performance and thermal conductivity between the electrode adapter and the electrode of the single battery cell. At the same time, after the electrode adapter and the electrode are positioned by the protrusion and the groove, the relative position of the electrode adapter and the electrode is relatively fixed, which facilitates the subsequent welding and can improve the welding quality.

[0024] 7. This utility model connects terminal adapters to the terminals of individual batteries. After constructing a large-capacity battery using individual batteries with terminal adapters, the heat exchange channels on each terminal adapter are connected to form a heat exchange channel for the large-capacity battery. By injecting a heat exchange medium into the heat exchange channel, heat exchange can be achieved on the terminals of the individual batteries, avoiding the problems that may be caused by excessively high terminal temperatures. At the same time, each terminal adapter is in direct contact with the heat exchange medium, which can improve the utilization efficiency of the heat exchange medium and thus improve the heat exchange effect of this type of large-capacity battery.

[0025] 8. In this utility model of a large-capacity battery, the sub-connecting pipe is set as a flexible tube, which can deform to compensate for the height difference between the terminals or terminal connectors of two individual cells, ensuring the reliability of the connection of the heat exchange channel between adjacent individual cells. At the same time, each sub-connecting pipe is connected to the heat exchange channel by adhesive bonding, improving the sealing performance at the connection between the sub-connecting pipe and the heat exchange channel.

[0026] 9. In the high-capacity battery of this utility model, an insulating sealant layer is laid on the top of the outer shell. This insulating sealant layer only needs to be injected once. Compared with the existing two-stage injection process, this structure is simple to inject and has better sealing performance than the two-stage injection structure.

[0027] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the pole adapter in Embodiment 1 of this utility model. Figure 1 ;

[0029] Figure 2 This is a schematic diagram of the pole adapter in Embodiment 1 of this utility model. Figure 2 ;

[0030] Figure 3 This is a schematic diagram of the pole adapter in Embodiment 1 of this utility model. Figure 3 ;

[0031] Figure 4This is a schematic diagram of the pole adapter (with heat-conducting ribs) in Embodiment 1 of this utility model;

[0032] Figure 5 This is a schematic diagram of the pole adapter in Embodiment 21 of this utility model. Figure 1 ;

[0033] Figure 6 This is a schematic diagram of the pole adapter in Embodiment 2 of this utility model. Figure 2 ;

[0034] Figure 7 This is a schematic diagram of the pole adapter (with heat-conducting ribs) in Embodiment 2 of this utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the large-capacity battery in Embodiment 3 of this utility model;

[0036] Figure 9 This is a schematic diagram of the pole adapter and connecting pipe assembly in Embodiment 3 of this utility model;

[0037] Figure 10 This is an exploded schematic diagram of the large-capacity battery in Embodiment 3 of this utility model;

[0038] Figure 11 This is a schematic diagram of the structure of the large-capacity battery in Embodiment 3 of this utility model;

[0039] Figure 12 This is an exploded schematic diagram of the large-capacity battery in Embodiment 3 of this utility model;

[0040] Figure 13 This is a schematic diagram of a large-capacity battery (with a baffle plate) in Embodiment 3 of this utility model.

[0041] Reference numerals: 1-Pole post adapter, 2-Single cell, 3-Shell, 4-Connecting pipe assembly, 11-First electrical connection body, 12-Second electrical connection body, 13-Electrical connection area, 111-Mounting hole, 112-Through hole, 113-Protrusion, 121-Heat exchange channel, 122-Heat-conducting rib plate, 21-Pole post, 31-Baffle plate, 41-Sub-connecting pipe. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] The phrase "other embodiments" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0045] In this specification, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] Furthermore, in the description of this utility model, it should be noted that the terms "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] During battery charging and discharging, a large amount of heat is generated. If the battery is not cooled in time, its performance will deteriorate. This invention provides a terminal adapter for connecting to the terminals (including positive and negative terminals) of a single battery cell. This terminal adapter can improve the problem of excessive local heat at the terminals of a single battery cell. At the same time, this terminal adapter can also facilitate electrical connection between adjacent single batteries.

[0048] The electrode adapter provided by this utility model includes a first electrical connection body and a second electrical connection body. The first electrical connection body has mounting holes, through which a reliable connection can be achieved between the electrode adapter and the electrode of each individual battery cell. The second electrical connection body has a heat exchange channel. By directly introducing a heat exchange medium into the heat exchange channel, heat exchange can be achieved on the electrode of the individual battery cell, avoiding problems that may be caused by excessive electrode temperature and ensuring the safety of large-capacity batteries. At the same time, the electrode adapter is in direct contact with the heat exchange medium, which improves the utilization efficiency of the heat exchange medium compared to indirect heat exchange, and has a better heat exchange effect. In addition, at least one of the first and second electrical connection bodies has an electrical connection area. The selection of multiple electrical connection areas allows for multiple ways to achieve electrical connection between adjacent individual batteries, making the electrical connection between adjacent individual batteries more convenient.

[0049] Therefore, the electrode adapter of this invention not only has the function of electrical connection, but also has high heat exchange efficiency. Furthermore, this electrode adapter can be integrally extruded and requires only one processing step, resulting in lower cost.

[0050] Example 1

[0051] like Figures 1 to 3 As shown, this embodiment provides a terminal adapter 1, which connects to the terminal 21 of a single battery cell 2. The terminal adapter 1 includes a first electrical connection body 11 and a second electrical connection body 12 arranged along the y-direction. The first electrical connection body 11 has a mounting hole 111 for connecting to the terminal 21 of the single battery cell 2, and the mounting hole 111 extends along the height direction of the first electrical connection body 11, i.e., along the z-direction. The second electrical connection body 12 has a heat exchange channel 121 for transmitting a heat exchange medium, and the heat exchange channel 121 extends along the x-direction, and the heat exchange channel 121 is isolated from the mounting hole 111. At least one of the first electrical connection body 11 and the second electrical connection body 12 has an electrical connection region 13, which enables electrical connection between adjacent single batteries cell 2.

[0052] The aforementioned terminal adapter 1 is installed onto each individual battery cell 2 and connected to the terminal of each individual battery cell. This terminal adapter 1 can achieve electrical connection between adjacent individual battery cells 2 in various ways. Furthermore, because the terminal adapter 1 is equipped with a heat exchange channel 121 for transmitting the heat exchange medium, the heat concentrated on the terminal cell 21 can be transferred from the terminal adapter 1 to the heat exchange medium within the heat exchange channel 121 and then carried away. Similarly, when the ambient temperature is too low and the individual battery cells 2 may not be able to start normally, the individual battery cells 2 can be heated through the heat exchange medium and the terminal adapter 1.

[0053] like Figure 1 and Figure 2As shown, in this embodiment, the first electrical connection body 11 and the second electrical connection body 12 of the pole adapter 1 are integral parts, which can be manufactured in various ways, such as casting, 3D printing, or machining. In this embodiment, the first electrical connection body 11 and the second electrical connection body 12 are preferably integrally extruded, which is not only low-cost but also easy to mass-produce. After extrusion molding, only the mounting hole 111 needs to be machined on the first electrical connection body 11, and only one machining operation is required afterward, making subsequent processing relatively simple.

[0054] When manufacturing the aforementioned pole adapter 1, it is generally made of a metal material with good electrical and thermal conductivity, such as silver, copper, or aluminum. However, considering both cost and thermal and electrical conductivity, aluminum is generally chosen as the material for the pole adapter 1.

[0055] In this embodiment of the electrode adapter 1, the shapes of the first electrical connection body 11 and the second electrical connection body 12 are designed according to requirements. Ideally, the cross-sectional shape of the first electrical connection body 11 should match the cross-sectional shape of the electrode post 21 of the single battery 2. Simultaneously, to obtain better heat dissipation and electrical connection effects, the volume of the first electrical connection body 11 can be maximized. The shape of the second electrical connection body 12 is designed to facilitate the setting of the heat exchange channel 121. In this embodiment, the first electrical connection body 11 and the second electrical connection body 12 are integrally formed into a rectangular block. In other embodiments, the first electrical connection body 11 can also be a cylinder, and the second electrical connection body 12 can be a rectangular block.

[0056] like Figure 3 As shown, after the aforementioned terminal adapter 1 is installed on the single cell 2, the terminal adapter 1 can realize the electrical connection between adjacent single cells 2. At this time, the electrical connection between adjacent single cells 2 can be realized through the first electrical connection body 11, or through the second electrical connection body 12, or simultaneously through both the first electrical connection body 11 and the second electrical connection body 12. Therefore, at least one of the aforementioned first electrical connection body 11 and second electrical connection body 12 is provided with an electrical connection area 13. Taking the first electrical connection body 11 and the second electrical connection body 12 as rectangular blocks as an example, the electrical connection area 13 can be the top end face of the first electrical connection body 11, or it can be one of the three circumferential side walls of the first electrical connection body 11; the electrical connection area 13 of the second electrical connection body 12 can be the top end face, the bottom end face, or the side wall away from the first electrical connection body 11.

[0057] In this embodiment, the electrode adapter 1 has a mounting hole 111 on the first electrical connection body 11. The electrode adapter 1 is connected to the electrode 21 of each individual battery 2 through the mounting hole 111. The connection can be made by screw connection, welding or riveting. However, considering the stability of the connection and the effect of heat conduction, this embodiment prefers to use welding to fix the two. In particular, the use of laser welding can further improve the welding efficiency.

[0058] like Figure 1 and Figure 3 As shown, when the terminal adapter 1 is connected to the terminal post 21 of each individual battery 2 by welding, the mounting hole 111 can be a blind hole, which can be a round hole, a square hole, or other irregularly shaped hole; in order to adapt to the shape of the terminal post 21, a round hole is preferred in this embodiment. The bottom of the blind hole is flat. During the welding process between the terminal adapter 1 and the terminal post 21 of the individual battery 2, the flat surface can provide a larger contact area, thereby making the weld more solid and ensuring a stable and reliable connection between the terminal post 21 and the terminal adapter 1. At the same time, a through hole 112 is opened at the bottom of the blind hole. The through hole 112 can eliminate welding stress and improve the reliability of the welding between the terminal adapter 1 and the terminal post 21 of the individual battery 2.

[0059] The aforementioned second electrical connection body 12 is provided with a heat exchange channel 121 for transmitting the heat exchange medium. This heat exchange channel 121 extends along the x-direction. After connecting each electrode adapter 1 to each individual battery cell 2, the heat exchange channels 121 between adjacent individual batteries cell 2 are connected through sub-connecting pipes in the connecting pipe assembly, thus realizing the transport of the heat exchange medium. Since the electrode adapter 1 is directly connected to the electrode 21, to ensure that the heat exchange medium flowing within the heat exchange channel 121 is not charged, an electrically insulating heat exchange medium, such as insulating oil or fluorinated liquid, can be used. Given that fluorinated liquid has a high thermal conductivity, this embodiment preferably uses a fluorinated liquid.

[0060] Meanwhile, the cross-section of the aforementioned heat exchange channel 121 can be designed according to requirements, as long as it can reliably connect with the sub-connecting pipe 41 in the connecting pipe assembly. Existing sub-connecting pipes are generally circular; therefore, the cross-section of the heat exchange channel 121 is generally also circular, as a circular heat exchange channel 121 is easier to connect to the sub-connecting pipe 41. In practical use, the cross-section of the heat exchange channel 121 can also be designed as elliptical, that is, an elliptical hole. An elliptical hole can reduce the overall height of the pole adapter 1, thereby further reducing the manufacturing cost of the pole adapter 1, and also facilitating the later sealing of the heat exchange channel 121 and the sub-connecting pipe 41.

[0061] like Figure 4As shown, multiple heat-conducting ribs 122 for increasing the heat exchange area can also be provided in the heat exchange channel 121. Each heat-conducting rib 122 extends along the x-direction, and multiple heat-conducting ribs 122 are evenly distributed circumferentially along the heat exchange channel 121. Through these heat-conducting ribs 122, the contact area between the heat exchange medium and the pole adapter 1 can be increased, thereby increasing the heat exchange area and further improving the heat exchange effect. Moreover, since multiple heat-conducting ribs 122 are evenly distributed circumferentially along the heat exchange channel 121, the temperature uniformity of each part of the pole adapter 1 is good. Each heat-conducting rib 122 extends axially along the heat exchange channel 121 and does not affect the flow of the heat exchange medium in the heat exchange channel 121.

[0062] Example 2

[0063] The pole adapter 1 in this embodiment is similar to the pole adapter 1 in Embodiment 1, except that, as in Embodiment 1, Figures 5 to 7 As shown, the bottom of the first electrical connection body 11 in the electrode adapter 1 of this embodiment is provided with a protrusion 113 for increasing the contact area with the electrode 21 of the single cell 2. At this time, the blind hole extends to the protrusion 113, and the through hole 112 passes through the protrusion 113.

[0064] In this embodiment, when the terminal adapter 1 is connected to the terminal of a single battery cell, each terminal of the single battery cell has a groove that matches the aforementioned protrusion. During installation, the protrusion of the terminal adapter 1 is embedded into the groove of the terminal, followed by welding. This type of terminal adapter not only ensures that the terminal adapter 1 can make tight contact with the terminal 21, guaranteeing the electrical connection and thermal conductivity between the terminal adapter 1 and the terminal 21 of the single battery cell 2, but also makes this structure suitable for existing single batteries with low terminal heights, enabling reliable connection between these batteries and the terminal adapter. Furthermore, this structure simplifies the installation and positioning of the terminal adapter 1 and the terminal 21. After the terminal adapter 1 and the terminal 21 are positioned by the protrusion and groove, their relative positions are relatively fixed, facilitating subsequent welding and improving welding quality.

[0065] Example 3

[0066] like Figure 8 As shown, this embodiment provides a single battery 2, which includes a battery casing and an electrode assembly and an electrolyte located inside the battery casing; the battery casing is formed by an upper cover assembly, a cylindrical body and a lower cover assembly; the upper cover assembly includes a cover plate and an electrode post 21 that is insulated and fixed on the cover plate, the electrode post including a positive electrode post and a negative electrode post; the electrode post adapter 1 in embodiment 1 or embodiment 2 is fixedly installed on both the positive electrode post and the negative electrode post.

[0067] Example 4

[0068] likeFigure 8 As shown, this embodiment provides a high-capacity battery, which includes a connecting tube assembly 4 and multiple individual cells 2 arranged along the same x-direction. The number of individual cells 2 can be adjusted according to actual needs. Figure 9 and Figure 10 As shown, the connecting pipe assembly 4 includes multiple sub-connecting pipes 41. The two ends of each sub-connecting pipe 41 are respectively connected to the heat exchange channel 121 on the adjacent single cell 2 terminal adapter 1 to realize the transportation of heat exchange medium. By directly introducing the heat exchange medium into the heat exchange channel, heat exchange of the single cell terminal can be realized, avoiding the problems that may be caused by excessive terminal temperature and ensuring the safety of large-capacity batteries.

[0069] The aforementioned sub-connecting pipe 41 is preferably made of flexible tubing, which can be made of rubber or silicone. Making the sub-connecting pipe 41 a flexible tubing allows for deformation compensation of the height difference between the two individual battery terminals 21 or terminal adapters 1, ensuring the reliability of the connection between the heat exchange channels 121 and adjacent individual batteries 2. Simultaneously, making the sub-connecting pipe 41 a flexible tubing also facilitates the connection between the sub-connecting pipe 41 and the heat exchange channel 121. Each sub-connecting pipe 41 can be connected to the heat exchange channel 121 by adhesive bonding or by thermoplastic bonding. For thermoplastic bonding, the end of the flexible tubing is heated and then inserted into the heat exchange channel 121. For adhesive bonding, after inserting the sub-connecting pipe 41 into the heat exchange channel 121, sealant can be applied to the connection point between the sub-connecting pipe 41 and the heat exchange channel 121. Alternatively, sealant can be applied to the end of the sub-connecting pipe 41 beforehand, and then the sub-connecting pipe 41 can be inserted into the heat exchange channel 121. This connection method improves the sealing performance and reliability of the connection between the sub-connecting pipe 41 and the heat exchange channel 121.

[0070] like Figure 8 As shown, after the individual cells are assembled into a large-capacity battery, the heat exchange channels 121 on the same side of the terminal adapter 1 of adjacent individual cells 2 are connected through the sub-connecting pipe 41. When the temperature of the large-capacity battery is higher than the set threshold, the large-capacity battery is cooled by introducing a heat exchange medium with a lower temperature into the heat exchange channel 121. When the temperature of the large-capacity battery is lower than the set threshold, the large-capacity battery is heated by introducing a heat exchange medium with a higher temperature into the heat exchange channel 121. By controlling the temperature of the heat exchange medium, it can be ensured that the large-capacity battery always operates at the normal operating temperature.

[0071] This embodiment may also include an electrolyte sharing chamber at the bottom of the large-capacity battery, connecting the electrolyte areas within the cavities of all individual battery cells 2 to achieve electrolyte sharing. This electrolyte sharing chamber can be a hollow component located at the bottom of the large-capacity battery, with through-holes in the hollow component, allowing multiple individual battery cells 2 to share electrolyte. This embodiment may also include a gas sharing chamber at the top of the large-capacity battery, connecting the gas areas within the cavities of all individual battery cells 2 to achieve gas balance. The structures of the electrolyte sharing chamber and gas sharing chamber can be found in the first and second hollow components in Chinese Patent CN117477186A, and the electrolyte sharing channel in CN115275453A.

[0072] Example 5

[0073] like Figure 11 and Figure 12 As shown, this embodiment provides another type of high-capacity battery. Unlike embodiment 3, this embodiment adds a casing 3 to the high-capacity battery of embodiment 3. Multiple individual batteries 2 are arranged in the same direction and placed inside the casing 3. The top plate of the casing 3 has clearance holes corresponding to the polarity terminals of each individual battery 2 (the overall structure of the terminal post 21 and the terminal post adapter 1 of the individual battery 2 serves as the polarity terminal of the individual battery 2). Each polarity terminal of the individual battery 2 extends out of the corresponding clearance hole. The area of ​​the top plate of the casing 3 corresponding to the clearance hole is fixedly sealed to the casing of the individual battery 2, thus sealing the gap between the polarity terminal and the clearance hole. A sealing connector can typically be used to achieve the fixed sealing between the top plate of the casing 3 and the casing of the individual battery 2. The sealing connector is a hollow tube, sleeved on the outside of the polarity terminal of the individual battery 2. The bottom of the sealing connector is sealed to the area around the polarity terminal on the top cover of the individual battery 2, and the top of the sealing connector is sealed to the area of ​​the top plate of the casing 3 corresponding to the clearance hole. Welding can be used to achieve the sealing connection.

[0074] The aforementioned outer casing 3 has a shared chamber, the inner cavity of which is connected to the inner cavities of all individual battery cells 2. By placing multiple individual battery cells 2 within an outer casing 3 that has a shared chamber, and utilizing this shared chamber's connection to the inner cavities of each individual battery cell 2 within the casing 3, the differences between the individual battery cells 2 are reduced, improving the consistency among them to some extent, thereby enhancing the cycle life of the high-capacity battery. The shared chamber specifically includes the following types:

[0075] The shared chamber within the outer casing 3 can be an electrolyte sharing chamber. The inner cavity of this shared electrolyte chamber is connected to the electrolyte area within each individual battery cell 2. This shared electrolyte chamber ensures that each individual battery cell 2 is in a uniform electrolyte environment, guaranteeing the homogeneity of the electrolyte within each cell and improving the performance and charge-discharge cycle life of the large-capacity battery. It should be noted that this shared electrolyte chamber is an electrolyte-containing chamber. After it is connected to the electrolyte area within each individual battery cell 2, it is necessary to ensure that the electrolyte throughout the entire large-capacity battery does not come into contact with the external environment.

[0076] The shared chamber within the aforementioned outer casing 3 can be a gas-sharing chamber. The inner cavity of this gas-sharing chamber is connected to the gas regions within the cavities of all individual battery cells 2. This gas-sharing chamber achieves gas balance among the individual battery cells 2, thereby improving the performance and charge-discharge cycle life of the large-capacity battery. In this structure, the upper cover of the individual battery cell 2 has a gas port that communicates with the inner cavity of the individual battery cell 2. The inner cavity of the gas-sharing chamber is connected to the gas regions within the cavities of each individual battery cell 2 through this gas port. Based on this gas-sharing chamber, the gas regions of each individual battery cell 2 can be connected, achieving gas balance.

[0077] The aforementioned shared chamber can be a gas-liquid shared chamber. The inner cavity of the gas-liquid shared chamber is connected to the electrolyte area and gas area of ​​all individual battery cells 2. Through a gas-liquid shared chamber, each individual battery cell 2 can be in a unified electrolyte and gas environment, improving the performance and charge-discharge cycle life of the large-capacity battery. In a specific configuration, the side plate of the outer casing 3 has a protrusion 113 extending along the arrangement direction of the individual battery cells 2. A gas-liquid shared chamber is formed at the protrusion 113, which is connected to the electrolyte area and gas area of ​​each individual battery cell 2.

[0078] The aforementioned shared chamber may also include an electrolyte shared chamber and a gas shared chamber. The inner cavity of the electrolyte shared chamber is connected to the electrolyte area of ​​all individual battery cells 2, and the inner cavity of the gas shared chamber is connected to the gas area of ​​all individual battery cells 2. This high-capacity battery places multiple individual battery cells 2 inside a housing 3 with a shared chamber. By utilizing this shared chamber and the inner cavity of each individual battery cell 2 located within the housing 3, the electrolyte and gas of each individual battery cell 2 are shared, ensuring the consistency of each individual battery cell 2. That is, by connecting the electrolyte and gas of each individual battery cell 2, the electrolyte and gas of all individual battery cells 2 are in the same system, reducing the differences between individual battery cells 2 and improving the consistency between individual battery cells 2 to a certain extent, thereby improving the cycle life of the high-capacity battery to a certain extent.

[0079] The aforementioned shared chamber may also include an electrolyte shared chamber and a gas shared chamber. The inner cavity of the electrolyte shared chamber is connected to the electrolyte area of ​​all individual battery cells 2. The gas shared chamber is a gas channel located between the top plate of the outer casing 3 and each individual battery cell 2. This gas channel covers the explosion-proof membrane on the top of each individual battery cell 2. When the explosion-proof membrane of any individual battery cell 2 is ruptured by the thermal runaway gas in the inner cavity, the gas area of ​​that individual battery cell 2 is connected to the inner cavity of the gas shared chamber. This gas shared chamber is used as an explosion-proof channel. That is, during the normal operation of the large-capacity battery, the inner cavity of each individual battery cell 2 is not connected to the explosion-proof channel. When any individual battery cell 2 experiences thermal runaway, the explosion-proof membrane on the top of that individual battery cell 2 is opened by the gas in the inner cavity, and the inner cavity of that individual battery cell 2 is connected to the explosion-proof channel. The thermal runaway gas is discharged through the explosion-proof channel, improving the safety of the large-capacity battery.

[0080] After assembling the individual cells into a large-capacity battery, the heat exchange channels 121 on the same side of the terminal adapter 1 of adjacent individual cells 2 are connected through the sub-connecting pipe 41. At this time, in this embodiment, an insulating sealant layer is laid on the top plate of the outer casing 3. When condensation occurs on the surface of the connecting pipe assembly 4, the condensation cannot penetrate into the gap between the terminal 21 and the clearance hole due to the obstruction of the insulating sealant layer, thereby preventing the battery from short-circuiting. Of course, when the insulating sealant is laid on the top plate of the outer casing 3, the insulating sealant will also penetrate into the connection between the sub-connecting pipe 41 and the heat exchange channel 121, sealing and reinforcing the connection between the sub-connecting pipe 41 and the terminal adapter 1. It should be noted that after the insulating sealant layer is laid, the liquid inlet and liquid outlet of the connecting pipe assembly 4 need to extend out of the insulating sealant layer. At the same time, the electrical connection area 13 on the terminal adapter 1 of each individual battery 2 also needs to extend out of the insulating sealant layer to facilitate subsequent electrical connection. Alternatively, the electrical connection of adjacent individual batteries can be carried out in advance, and some electrical connectors can also be embedded in the insulating sealant layer.

[0081] In this embodiment, only one injection is required when injecting adhesive into the top plate of the outer casing 3. Compared with the existing two-stage injection process, this structure is simpler to inject adhesive into and provides better sealing.

[0082] like Figure 13 As shown, in order to facilitate the application of an insulating sealant layer on the top of the outer casing 3, a baffle plate 31 is provided on the top of the outer casing 3 to prevent the insulating sealant from overflowing from part of the injection area.

Claims

1. A pole adapter, characterized in that, It includes a first electrical connection body and a second electrical connection body arranged along the y-direction; The first electrical connection body is provided with mounting holes for connecting to the terminal post of a single battery cell, and the mounting holes are arranged along the height direction of the first electrical connection body; The second electrical connection body is provided with a heat exchange channel for transmitting the heat exchange medium, and the heat exchange channel extends along the x-direction; At least one of the first electrical connection body and the second electrical connection body is provided with an electrical connection area to realize the electrical connection between adjacent single cells.

2. The pole adapter according to claim 1, characterized in that, The first electrical connection body and the second electrical connection body are integrally extruded.

3. The pole adapter according to claim 1, characterized in that, The heat exchange channel has an elliptical or circular cross-section.

4. The pole adapter according to claim 3, characterized in that, The heat exchange channel is provided with multiple heat-conducting ribs to increase the heat exchange area. Each heat-conducting rib extends along the x-direction and is evenly distributed along the circumference of the heat exchange channel.

5. The pole adapter according to claim 1, characterized in that, The mounting hole is a blind hole with a flat bottom, used to connect to the terminal of a single battery cell by welding. A through hole is opened at the bottom of the blind hole, and the diameter of the through hole is smaller than the diameter of the blind hole.

6. The pole adapter according to claim 5, characterized in that, The bottom of the first electrical connection body is provided with a protrusion for increasing the contact area with the terminal of the single battery cell, the blind hole extends to the protrusion, and the through hole passes through the protrusion.

7. A single-cell battery, characterized in that, The battery includes a battery casing and an electrode assembly and electrolyte located within the battery casing; the battery casing is formed by an upper cover assembly, a cylindrical body and a lower cover assembly; the upper cover assembly includes a cover plate and an electrode post insulated and fixed to the cover plate, the electrode post including a positive electrode post and a negative electrode post; the electrode post adapter according to any one of claims 1 to 6 is fixedly installed on both the positive electrode post and the negative electrode post.

8. A high-capacity battery, characterized in that, It includes multiple single-cell batteries and connecting tube assemblies as described in claim 7; multiple single-cell batteries are arranged in sequence; the connecting tube assembly includes multiple sub-connecting tubes, and the two ends of each sub-connecting tube are respectively connected to the heat exchange channels on the adjacent single-cell battery terminal adapter, thereby connecting the heat exchange channels on the adjacent single-cell battery terminal adapter.

9. The high-capacity battery according to claim 8, characterized in that, The sub-connecting pipes are flexible tubes, and each sub-connecting pipe is connected to the heat exchange channel by adhesive bonding.

10. The high-capacity battery according to claim 8, characterized in that, It also includes a housing, with multiple individual cells arranged along the x-direction in the inner cavity of the housing; the housing has at least one shared chamber, the inner cavity of the shared chamber and the inner cavities of all individual cells are connected; the top plate of the housing has clearance holes corresponding to the terminals of each individual cell; each individual cell terminal extends out of the clearance hole, and the area of ​​the top plate of the housing corresponding to the clearance hole is fixedly sealed to the individual cell housing.

11. The high-capacity battery according to claim 10, characterized in that, The top of the outer casing is covered with an insulating sealant layer, which wraps around each sub-connecting pipe and pole adapter. Meanwhile, the electrical connection area of ​​the pole adapter is exposed by the insulating sealant layer.

Images