An intermediate electrode connector, an end electrode connector, a battery module, and a battery pack

Abstract

The present application relates to a kind of intermediate electrode connector, end electrode connector, battery module and battery pack, by the use of intermediate electrode connector, end electrode connector, the electrode of electric core can be electrically connected while being cooled by coolant, the quick cooling of electric connection can be realized;Various connection zones are set on the electrode connector, the inflowing coolant can be changed from horizontal current to turbulent flow, improve the efficiency of heat exchange between coolant and electric connection;The present application can quickly take away the heat generation of electric connection by using coolant directly contact and flow with electric connection current-carrying fluid, reduce the temperature rising rate, at the same time, by the contact between electric connection current-carrying fluid and the electrode inside electric core, the heat conduction path is shortened, and quick heat conduction is realized;In the occasion of quick temperature rise and large heat generation, quick heat conduction is realized, in the high-power input and output condition of system, the cross-sectional area of current-carrying fluid does not need to be increased.

Description

Technical Field

[0001] This invention relates to the field of power battery technology, and in particular to an intermediate electrode connector, an end electrode connector, a battery module, and a battery pack. Background Technology

[0002] Power batteries provide power for electric vehicles, electric trains, electric bicycles, and golf carts. A power battery consists of several cells connected in series and parallel. Currently, there are two main methods for connecting cells: First, laser welding on a welding station and bolting together current-carrying aluminum busbars results in high contact resistance and significant heat generation at the weld, leading to rapid temperature rise. Second, electrical connections between cells are made using cables, typically employing natural cooling or increasing the current-carrying cross-sectional area to reduce heat generation. Power battery liquid cooling plates are mostly applied to the bottom and sides of the cells, which are far from the electrical connections. Heat at the electrical connections is not easily conducted through the liquid cooling plates. Furthermore, considering the insulation of the electrical connections, liquid cooling is generally not used at these locations. Currently, the rated power of power batteries is limited by the heat generation and current-carrying capacity of the cells, and cannot fully meet the demands of high-power operating conditions. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an intermediate electrode connector, an end electrode connector, a battery module, and a battery pack that can cool down the electrical connection position.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: an intermediate electrode connector, including a first connection area, a second connection area, and a third connection area, wherein the first connection area and the second connection area are respectively connected to the cell electrode, the third connection area is connected to the sampling terminal, and the third connection area is located between the first connection area and the second connection area; a first chamber is provided around the first connection area, a second chamber is provided around the second connection area, and a third chamber is provided around the third connection area, wherein the first chamber and the third chamber are in communication, the second chamber and the third chamber are in communication, a first opening is provided on the first chamber, and a second opening is provided on the second chamber.

[0005] More specifically, a flat and hollow metal part is pressed down on both sides to make the top plate of the metal part contact the bottom plate to form a first contact position. The first contact position forms a first connection area and a second connection area. The first chamber and the second chamber are formed around the first contact position. The metal part is pressed down and up in the middle to make the top plate of the metal part contact the bottom plate to form a second contact position. The second contact position forms the third connection area. The third chamber is formed around the second contact position.

[0006] More specifically, both the first and second connecting areas are circular, and the positions of the first and second chambers away from the third connecting area are arc-shaped; the third connecting area is rectangular, and the portion of the first chamber near the third connecting area is completely connected to the third chamber, as is the portion of the second chamber near the third connecting area.

[0007] An end electrode connector includes a fourth connection region and a fifth connection region, a fourth chamber is provided around the fourth connection region, a fifth chamber is provided around the fifth connection region, the fourth chamber and the fifth chamber are in communication, a fourth opening is provided on the fourth chamber, and a fifth opening is provided on the side of the fifth chamber away from the fourth connection region.

[0008] More specifically, a flat, hollow metal component is pressed down on one side, causing the top plate of the metal component to contact the bottom plate to form a third contact position. The third contact position forms the fourth connection area, and a fourth chamber is formed around the third contact position. The metal component is pressed down and up in the middle, causing the top plate of the metal component to contact the bottom plate to form a fourth contact position. The fourth contact position forms the fifth connection area, and a fifth chamber is formed around the fourth contact position. The fifth opening is circular and is used to connect to an external pipe.

[0009] More specifically, the fourth connecting area is circular, and the portion of the fourth chamber away from the fifth connecting area is arc-shaped; the fifth connecting area is rectangular, and the portion of the fourth chamber near the fifth connecting area is completely connected to the fifth chamber.

[0010] A battery module includes a housing, a plurality of battery cells disposed within the housing, and a cover plate disposed on the housing. The electrodes of adjacent battery cells are connected by the aforementioned intermediate electrode connectors, thereby forming a series connection among the battery cells. An insulating pipe connects the first and second openings of the adjacent intermediate electrode connectors, thereby forming a series connection among the intermediate electrode connectors. The electrodes of the series-connected battery cells used for external connection are provided with the aforementioned end electrode connectors. Two fifth openings are respectively connected to conductive pipes, which allow coolant to enter and exit the end electrode connectors.

[0011] More specifically, the fifth opening is connected to the conductive tube via a liquid-cooled connection assembly.

[0012] More specifically, the liquid-cooled connection assembly includes a conductive sleeve fixed to the fifth opening, an insulating base sleeved on the conductive sleeve, an external thread on the outer wall of the insulating base, a conductive insertion tube connected to the conductive tube and insertable into the conductive sleeve, a locking element on the conductive insertion tube, and an internal thread on the locking element that mates with the external thread. The internal thread and the external thread are locked together to fix the conductive insertion tube inside the conductive sleeve, and the conductive sleeve and the conductive insertion tube are connected to conduct electricity.

[0013] More specifically, an annular first positioning protrusion is formed inwardly on the inner wall of the conductive sleeve, a first conical surface is formed on the side of the first positioning protrusion near the conductive insertion tube, and a second conical surface is formed inwardly at the end of the conductive insertion tube near the first positioning protrusion, with the first conical surface and the second conical surface fitting together.

[0014] More specifically, at least one first positioning groove is provided on the inner wall of the conductive sleeve, and a slanted spring is provided in the first positioning groove.

[0015] More specifically, a third positioning groove is provided on the inner wall of the conductive sleeve, and a sealing ring is provided in the third positioning groove.

[0016] More specifically, a pushing ring extends radially outward from the outer wall of the conductive insertion tube. The locking member abuts against the pushing ring, and through the engagement of the internal and external threads, the locking member pushes the conductive insertion tube into the conductive sleeve.

[0017] More specifically, a limiting ring extends radially outward from the outer wall of the conductive insertion tube, and a limiting gap is formed between the pushing ring and the limiting ring, with the locking element being engaged within the limiting gap.

[0018] A battery pack is composed of several battery modules connected in series or in parallel as described above. Adjacent battery modules are connected by conductive tubes. A baffle plate is provided inside the conductive tube, which divides the interior of the conductive tube into a first conveying channel and a second conveying channel. A first conveying pipe is connected to the first conveying channel, and a second conveying pipe is connected to the second conveying channel. The first conveying pipe is connected to one of the adjacent battery modules through the first conveying channel, and the second conveying pipe is connected to the other of the adjacent battery modules through the second conveying channel.

[0019] The beneficial effects of this invention are as follows: By using intermediate electrode connectors and end electrode connectors, the electrodes of the battery cell can be electrically connected while being cooled by coolant, enabling rapid cooling of the electrical connection points; simultaneously, by setting various connection areas on the electrode connectors, the flowing coolant can be changed from laminar flow to turbulent flow, improving the efficiency of heat exchange between the coolant and the electrical connection points; by using coolant to directly contact and flow with the electrical connection carrier fluid, this invention can quickly remove the heat generated at the electrical connection points, reducing the heating rate; at the same time, by having the electrical connection carrier fluid contact the internal electrodes of the battery cell, the heat conduction path is shortened, achieving rapid heat conduction; in situations with rapid heating and high heat generation, rapid heat conduction is achieved, enabling the system to operate under high power input and output conditions without increasing the cross-sectional area of ​​the carrier fluid. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery module of the present invention;

[0021] Figure 2 This is a top view of the battery module of the present invention.

[0022] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the DD region;

[0023] Figure 4 yes Figure 3 Enlarged structural diagram of part E in the middle;

[0024] Figure 5 This is a structural schematic diagram of the battery module of the present invention (without the housing and cover plate);

[0025] Figure 6 yes Figure 5 Enlarged structural diagram of section F in the middle;

[0026] Figure 7 This is a schematic diagram of the structure of the intermediate electrode connector of the present invention;

[0027] Figure 8 This is a cross-sectional structural schematic diagram of the intermediate electrode connector of the present invention;

[0028] Figure 9 This is a schematic diagram of the end electrode connector of the present invention;

[0029] Figure 10 This is a cross-sectional view of the end electrode connector of the present invention;

[0030] Figure 11 This is a schematic diagram of the structure of the locking element of the present invention;

[0031] Figure 12 This is a cross-sectional structural schematic diagram of the locking component of the present invention;

[0032] Figure 13 This is a schematic diagram of the structure of the insulating base of the present invention;

[0033] Figure 14 This is a cross-sectional structural schematic diagram of the insulating base of the present invention;

[0034] Figure 15 This is a schematic diagram of the structure of the conductive tube of the present invention;

[0035] Figure 16 This is a cross-sectional view of the conductive tube of the present invention;

[0036] Figure 17 yes Figure 16 A magnified structural diagram of section G in the middle;

[0037] Figure 18 This is a schematic diagram of the connection structure of two battery modules in the battery pack of the present invention.

[0038] In the diagram: 100, battery module; 101, battery module A; 102, battery module B; 110, casing; 120, cover plate; 130, battery cell;

[0039] 140. Intermediate electrode connector; 141. First connection area; 142. Second connection area; 143. Third connection area; 144. First chamber; 145. Second chamber; 146. Third chamber; 147. First opening; 148. Second opening; 149. Connector;

[0040] 150. End electrode connector; 151. First end electrode connector; 152. Second end electrode connector; 153. Fourth connection area; 154. Fifth connection area; 155. Fourth chamber; 156. Fifth chamber; 157. Fourth opening; 158. Fifth opening;

[0041] 160. Insulated pipes;

[0042] 170. Liquid-cooled connection assembly; 171. Conductive sleeve; 1711. First positioning protrusion; 1712. First conical surface; 1713. First positioning groove; 1714. Second positioning protrusion; 1715. Third positioning groove; 172. Insulating base; 1721. Base body; 1722. Fixing plate; 1723. External thread; 1724. Second positioning groove; 173. Conductive insertion tube; 1731. Second conical surface; 1732. Push ring; 1733. Limiting ring; 1734. Limiting gap; 174. Locking element; 1741. Locking body; 1742. Annular limiting plate; 1743. Internal thread; 175. Inclined spring;

[0043] 200. Conductive tube; 201. Conductive tube A; 202. Conductive tube B; 203. Conductive tube C; 210. First conveying channel; 220. Second conveying channel; 230. Baffle plate;

[0044] 300. First conveying pipeline; 301. First conveying pipeline A; 302. First conveying pipeline B; 303. First conveying pipeline C;

[0045] 400. Second conveying pipeline; 401. Second conveying pipeline A; 402. Second conveying pipeline B; 403. Second conveying pipeline C. Detailed Implementation

[0046] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0049] like Figure 1 , Figure 2 , Figure 3 as well as Figure 5The present invention provides a battery module 100, including a housing 110, a plurality of battery cells 130 disposed within the housing 110, and a cover plate 120 disposed on the housing 110. The electrodes of adjacent battery cells 130 are connected by intermediate electrode connectors 140, forming a series connection. Adjacent intermediate electrode connectors 140 are connected by insulating conduits 160. Among the series-connected battery cells 130, two are connected to the outside. End electrode connectors 150 are connected to the electrodes of these two battery cells 130. The two end electrode connectors 150 are respectively... The first end electrode connector 151 and the second end electrode connector 152 are respectively connected to a conductive tube 200. The first end electrode connector 151 is the positive electrode of the battery module 100, and the second end electrode connector 152 is the negative electrode of the battery module 100. Both the first end electrode connector and the second end electrode connector are connected to a conductive tube 200. That is, one of the two conductive tubes 200 is connected to the positive electrode of the battery module 100, and the other is connected to the negative electrode of the battery module 100. The conductive tube 200 can not only conduct electricity, but also deliver insulating coolant to the end electrode connector 150 and the intermediate electrode connector 140. The coolant can be perfluorohexanone solution.

[0050] Based on the above structure, in order to ensure that the intermediate electrode connector 140 and the end electrode connector 150 can conduct electricity and allow coolant to pass through, it is necessary to design the intermediate electrode connector 140 and the end electrode connector 150.

[0051] like Figure 6 , Figure 7 and Figure 8The intermediate electrode connector 140 of this application includes a first connection area 141, a second connection area 142, and a third connection area 143. The first connection area 141 and the second connection area 142 are respectively connected to the electrodes of adjacent battery cells 130. For example, the first connection area 141 is connected to the positive electrode of one battery cell 130, and the second connection area 142 is connected to the negative electrode of the other battery cell 130. The third connection area 143 is connected to a sampling terminal, which detects the specific operating status of the battery cell 130 and feeds it back. The first connection area 141, the second connection area 142, and the third connection area 143 are also connected to the electrodes of adjacent battery cells 130. 142 is connected to the electrode by laser welding, and the third connection area 143 is also connected to the sampling terminal by laser welding; a first chamber 144 is formed around the first connection area 141, the first chamber 144 is circular, and the portion of the first chamber 144 away from the third connection area 143 is arc-shaped; a second chamber 145 is formed around the second connection area 142, the second chamber 145 is circular, and the portion of the second chamber 145 away from the third connection area 143 is arc-shaped. The third connection area 143 is partially arc-shaped; the shapes of the first connection area 141 and the second connection area 142 are mainly for adaptation to the electrodes of the battery cell 130, but can also be set to other shapes depending on the specific situation; a third chamber 146 is formed around the third connection area 143, the third connection area 143 is rectangular, and the third chamber 146 is a ring-shaped rectangle; the width of the portion of the first chamber 144 near the third connection area 143 is the same as the width of the third chamber 146, ensuring that the two are completely connected, the third The width of the portion of the second chamber 145 near the third connecting area 143 is the same as the width of the third chamber 146, ensuring complete communication between the two. A first opening 147 is provided on the first chamber 144, and a second opening 148 is provided on the second chamber 145. Quick connectors 149 are provided on the first opening 147 and the second opening 148. The first opening 147 of one of the two adjacent intermediate electrode connectors 140 is connected to the second opening 148 of the other through an insulating pipe 160. This process can be repeated to achieve series connection of several intermediate electrode connectors 140.

[0052] The intermediate electrode connector 140 is manufactured from a flat and hollow metal part, which includes a top plate, a bottom plate, and a side plate. Pressing down on both sides of the metal part causes the top plate to contact the bottom plate, forming a first contact position. The first contact position is a downwardly concave groove, with only the top plate facing down while the bottom plate remains stationary. The two first contact positions form a first connection area 141 and a second connection area 142. During the pressing process, a first chamber 144 and a second chamber 145 are formed around the two first contact positions, respectively. Simultaneous pressing down and pressing up on the middle of the metal part causes the top plate to contact the bottom plate, forming a third contact position. The third contact position is a groove that is concave both vertically and horizontally. The top plate and the bottom plate move inward and contact each other at the middle position. The third contact position forms a third connection area 143. During the pressing down and pressing up, a third chamber 146 is formed around the third contact position.

[0053] like Figure 9 and Figure 10 The end electrode connector 150 of this application includes a fourth connection area 153 and a fifth connection area 154. The fourth connection area 153 has the same structure as the first connection area 141 and the second connection area 142 of the intermediate electrode connector 140. The fourth connection area 153 is used to connect to the electrode of the battery cell 130 connected to the outside, and the fourth connection area 153 is connected to the electrode by laser welding. The fifth connection area 154 has the same structure as the third connection area 143 of the intermediate electrode connector 140. It is used to connect to the sampling terminal, and the fifth connection area 154 is connected to the sampling terminal by laser welding. A fourth chamber 155 is formed around the fourth connection area 153. A fourth connecting area 153 is formed, which is circular. The portion of the fourth chamber 155 away from the fifth connecting area 154 is arc-shaped. A fifth chamber 156 is formed around the fifth connecting area 154. The fifth connecting area 154 is rectangular, and the fifth chamber 156 is a ring-shaped rectangle. The width of the portion of the fourth chamber 155 near the fifth connecting area 154 is the same as the width of the fifth chamber 156, ensuring that the two are completely connected. A fourth opening 157 is provided on the fourth chamber 155, and a fifth opening 158 is provided on the side of the fifth chamber 156 away from the fourth connecting area 153. The fifth opening 158 is cylindrical and is used to connect to the conductive tube 200.

[0054] The end electrode connector 150 has a similar structure to the intermediate electrode connector 140, and is also made of a flat and hollow metal part. Pressing down on one side of the metal part causes the top plate to contact the bottom plate to form a fourth contact position. The fourth contact position is a downwardly concave groove, with only the top plate facing down while the bottom plate remains stationary. The fourth contact position forms a fourth connection area 153. During the pressing process, a fourth chamber 155 is formed around the fourth contact position. Pressing down and pressing up simultaneously in the middle of the metal part causes the top plate to contact the bottom plate to form a fifth contact position. The fifth contact position is a groove that is concave both vertically and horizontally. The top plate and bottom plate move inward and contact each other in the middle position. The fifth contact position forms a fifth connection area 154. During the pressing down and pressing up, a fifth chamber 156 is formed around the fifth contact position, and the fifth opening 158 is machined into a cylindrical shape.

[0055] Both the first end electrode connector 151 and the second end electrode connector 152 are fixedly connected by the liquid-cooled connection assembly 170, which ensures the sealing performance of the connection while achieving conductivity.

[0056] like Figure 4 and Figure 10 The liquid-cooled connection assembly 170 shown includes a conductive sleeve 171 fixed to the fifth opening 158, an insulating base 172 sleeved on the conductive sleeve 171, an external thread 1723 provided on the outer wall of the insulating base 172, a conductive insertion tube 173 connected to the conductive tube 200 and insertable into the conductive sleeve 171, a locking member 174 provided on the conductive insertion tube 173, and an internal thread 1743 provided on the locking member 174 and cooperating with the external thread 1723. The insulating base 172 is connected to the housing. On 110, the conductive sleeve 171 can be fixed and ensured that the conductive sleeve 171 does not contact the housing 110. The conductive insertion tube 173 is inserted into the conductive sleeve 171, and the conductive insertion tube 173 and the conductive sleeve 171 are locked by the internal thread 1743 of the locking member 174 cooperating with the external thread 1723 on the insulating base 172. The conductive sleeve 171 and the conductive insertion tube 173 are connected at the overlapping part to realize electrical connection. The conductive sleeve 171 and the end electrode connector 150 are integrally formed.

[0057] A first annular positioning protrusion 1711 protrudes inward inside the conductive sleeve 171. A first conical surface 1712 is formed on the side of the first positioning protrusion 1711 near the conductive insertion tube 173. A second conical surface 1731 is formed inward at the end of the conductive insertion tube 173 near the first positioning protrusion 1711. The first conical surface 1712 and the second conical surface 1731 fit together, wherein the first conical surface 1712 and the second conical surface 1731 are inclined at the same angle so that they can fit together completely. The cross-section of the first positioning protrusion 1711 is triangular. The cooperation between the first conical surface 1712 and the second conical surface 1731 can make the axis of the conductive sleeve 171 coincide with that of the conductive insertion tube 173, which has a guiding and positioning function to ensure that the installation is in place, and also restricts the axial movement of the conductive insertion tube 173.

[0058] To further facilitate the electrical connection between the conductive insertion tube 173 and the conductive sleeve 171, an elastic conductive element is provided between the conductive insertion tube 173 and the conductive sleeve 171. In this design, the conductive element is preferably a helical spring 175. Simultaneously, the cooperation between the first conical surface 1712 and the second conical surface 1731 ensures that the deformation of the helical spring 175 is consistent. At least one helical spring 175 is provided, and multiple helical springs 175 can be provided to improve the stability of the electrical connection. A first positioning groove 1713 is provided on the inner wall of the conductive sleeve 171, and the helical spring 175 is fixed within the first positioning groove 1713. The number of 713 is the same as the number of inclined coil springs 175. In this scheme, three first positioning grooves 1713 are provided and are arranged at equal intervals, and three inclined coil springs 175 are also provided. The first positioning grooves 1713 are formed by stamping. At the same time as the first positioning grooves 1713 are formed, the conductive sleeve 171 bulges outward in the radial direction to form a second positioning protrusion 1714. A second positioning groove 1724 is formed on the inner wall of the insulating base 172. The second positioning protrusion 1714 is engaged in the second positioning groove 1724 to realize the positioning and fixation of the insulating base 172 and the conductive sleeve 171. The conductive insertion tube 173 and the conductive tube 200 can be integrally formed.

[0059] A third positioning groove 1715 is provided on the inner wall of the conductive sleeve 171, and a sealing ring is installed in the third positioning groove 1715. The third positioning groove 1715 is located near the first positioning protrusion 1711.

[0060] like Figure 13 and Figure 14The insulating base 172 shown includes a cylindrical base body 1721 and a fixing plate 1722 formed radially outward at the end of the base body 1721. The fixing plate 1722 is fixedly connected to the housing 110. The external thread 1723 is provided on the outer wall of the base body 1721, and the second positioning groove 1724 is provided on the inner wall of the base body 1721. During processing, the base body 1721 is processed by a cylindrical sleeve. During the forming of the second positioning groove 1724, the corresponding part protrudes radially outward.

[0061] like Figure 11 and Figure 12 The locking element 174 shown includes a cylindrical locking body 1741 and an annular limiting plate 1742 formed radially inward at the end of the locking body 1741. The annular limiting plate 1742 is sleeved on the conductive insertion tube 173. The internal thread 1743 is provided on the inner wall of the locking body 1741, and the internal thread 1743 cooperates with the external thread 1723 on the insulating base 172 to fix the conductive insertion tube 173 and the conductive sleeve 171 together. At the same time, in order to facilitate the inward movement of the conductive insertion tube 173 by the locking element 174, the conductive insertion tube 173 is positioned within the conductive sleeve 174. A push ring 1732 extends radially outward from the outer wall of tube 173. The outer diameter of the push ring 1732 is larger than the inner diameter of the annular limiting plate 1742 and smaller than the outer diameter of the annular limiting plate 1742. That is, the push ring 1732 can move within the locking body 1741. Rotating the locking body 1741 causes the internal thread 1743 to engage with the external thread 1723. The annular limiting plate 1742 will apply an inward pushing force to the push ring 1732, so that the conductive insertion tube 173 enters the conductive sleeve 171 until the first conical surface 1712 and the second conical surface 1731 are in contact, and the tube is installed in place.

[0062] Furthermore, to ensure the position of the locking element 174, such as Figure 4 , Figure 15 , Figure 16 as well as Figure 17 As shown, a limiting ring 1733 extends radially outward from the outer wall of the conductive insertion tube 173. A limiting gap 1734 is formed between the pushing ring 1732 and the limiting ring 1733. An annular limiting plate 1742 on the locking member 174 is disposed within the limiting gap 1734. The annular limiting plate 1742 can rotate within the limiting gap 1734 and can slightly wobble in its axial direction. After the locking member 174 is installed, the annular limiting plate 1742 and the pushing ring 1732 are in a tight fit, and the locking member 174 will not wobble at this time.

[0063] Based on the aforementioned battery module 100, a battery pack can be formed by connecting several battery modules 100 in series, parallel, or a combination of series and parallel connections. Adjacent battery modules 100 are directly connected via conductive tubes 200. Figure 1 and Figure 16 As shown, a baffle plate 230 is provided inside the conductive tube 200, which divides the interior of the conductive tube 200 into a first conveying channel 210 and a second conveying channel 220. A first conveying pipe 300 is connected to the first conveying channel 210, and a second conveying pipe 400 is connected to the second conveying channel 220. The first conveying pipe 300 is connected to one of the adjacent battery modules 100 through the first conveying channel 210, and the second conveying pipe 400 is connected to the other of the adjacent battery modules 100 through the second conveying channel 220. Both the first conveying pipe 300 and the second conveying pipe 400 are made of insulating material.

[0064] Based on the structure of the battery pack described above, when there are two, three, four, or more battery modules 100, their connection methods and coolant flow patterns are basically the same. The following detailed explanation will focus on two adjacent battery modules 100 connected in series within the battery pack.

[0065] like Figure 18 The battery module A 101 shown includes an inlet A 101 and an outlet A. In this case, the inlet A is also the positive electrode of battery module A 101, and the outlet A is the negative electrode of battery module A 101. Battery module B 102 includes an inlet B and an outlet B. In this case, the inlet B is also the positive electrode of battery module B 102, and the outlet B is the negative electrode of battery module B 102. The inlet A is connected via a conductive tube A 201, the outlet A is connected to the inlet B via a conductive tube B 202, and the outlet B is connected via a conductive tube C 203. This connection forms a series connection between battery module A 101 and battery module B 102. If a parallel connection is desired, it is achieved by arranging conductive tubes 200 connected to the inlet and outlet.

[0066] Correspondingly, conductive tube A 201 has a first conveying channel A and a second conveying channel A, and conductive tube A 201 has a first conveying pipe A 301 and a second conveying pipe A 401; conductive tube B 202 has a first conveying channel B and a second conveying channel B, and conductive tube B 202 has a first conveying pipe B 302 and a second conveying pipe B 402; conductive tube C 203 has a first conveying channel C and a second conveying channel C, and conductive tube C 203 has a first conveying pipe C 303 and a second conveying pipe C 403. The coolant flows through the battery module A 101 as follows: First, the coolant is transported to the second transport channel A through the second transport pipe A 401. Due to the baffle plate 230, the coolant in the second transport channel A will not enter the first transport channel A. The coolant enters the inlet A (i.e., the fifth opening 158 of the end electrode connector 150) of the battery module A 101 along the second transport channel A. After passing through the first end electrode connector 151, several intermediate electrode connectors 140 and the second end electrode connector 152 in the battery module A 101, the coolant enters the outlet A. The coolant then enters the first transport channel B of the conductive pipe B 202 and is discharged through the first transport pipe B 302. Due to the action of the baffle plate 230, the coolant in the first transport channel B will not enter the second transport channel B. The coolant flows through the battery module B 102 as follows: First, the coolant is transported to the second transport channel B through the second transport pipe B 402. The coolant then enters the inlet B of the battery module B 102 along the second transport channel B, passes through the first end electrode connector 151, several intermediate electrode connectors 140, and the second end electrode connector 152 in the battery module B 102, and then enters the outlet B. The coolant then enters the first transport channel C of the conductive pipe C 203, and is then discharged through the first transport pipe C 303. Due to the action of the baffle plate 230, the coolant in the first transport channel C will not enter the second transport channel C.

[0067] In summary, the intermediate electrode connector 140 enables electrical connection between the battery cells 130 and forms a coolant flow channel, while the end electrode connector 150 enables electrical connection between the battery cells 130 and external devices and forms a flow channel, thus achieving rapid cooling at the electrode connection points. Simultaneously, the various connection areas on the electrode connectors create a certain degree of obstruction within the flow channel, causing the incoming coolant to change from a laminar flow to a turbulent flow, improving the efficiency of heat exchange between the coolant and the electrical connection points. This invention, by having the coolant directly contact and flow with the fluid carrying the electrical connection, can quickly remove the heat generated at the electrical connection points. This reduces the heating rate, and by electrically connecting the carrier fluid to the internal electrodes of the cell 130, the heat conduction path is shortened, achieving rapid heat conduction. In situations with rapid heating and high heat generation, rapid heat conduction is achieved, enabling the system to operate under high power input and output conditions without increasing the cross-sectional area of ​​the carrier fluid. The resulting battery module 100 and battery pack can be connected in series, in parallel, or in a series-parallel combination. The internal baffle plate 230 of the conductive tube 200 ensures that the coolant in adjacent battery modules 100 is not shared, thus ensuring the cooling effect while maintaining the connection between the electrodes.

[0068] It should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A battery pack, characterized in that, It is composed of several battery modules (100) connected in series or in parallel. Adjacent battery modules (100) are connected by conductive tubes (200). A baffle plate (230) is provided inside the conductive tube (200). The baffle plate (230) divides the inside of the conductive tube (200) into a first conveying channel (210) and a second conveying channel (220). A first conveying pipe (300) is connected to the first conveying channel (210), and a second conveying pipe (400) is connected to the second conveying channel (220). The first conveying pipe (300) is connected to one of the adjacent battery modules (100) through the first conveying channel, and the second conveying pipe (400) is connected to the other of the adjacent battery modules (100) through the second conveying channel. The battery module includes a housing (110), a plurality of battery cells (130) disposed within the housing (110), and a cover plate (120) disposed on the housing (110). The electrodes of adjacent battery cells (130) are connected by intermediate electrode connectors (140) to form a series connection. An insulating pipe (160) is connected between the first opening (147) and the second opening (148) of the adjacent intermediate electrode connectors (140) to form a series connection. End electrode connectors (150) are provided on the electrodes of the series-connected battery cells (130) for external connection. Two fifth openings (158) are respectively connected to conductive pipes (200), which allow coolant to enter and exit the end electrode connectors (150). The intermediate electrode connector includes a first connection area (141), a second connection area (142), and a third connection area (143). The first connection area (141) and the second connection area (142) are respectively connected to the electrodes of the battery cell (130). The third connection area (143) is connected to the sampling terminal. The third connection area (143) is located between the first connection area (141) and the second connection area (142). A first chamber (144) is provided around the first connection area (141), a second chamber (145) is provided around the second connection area (142), and a third chamber (146) is provided around the third connection area (143). The first chamber (144) and the third chamber (146) are connected, and the second chamber (145) and the third chamber (146) are connected. A first opening (147) is provided on the first chamber (144), and a second opening (148) is provided on the second chamber (145). The end electrode connector includes a fourth connection area (153) and a fifth connection area (154). A fourth chamber (155) is provided around the fourth connection area (153), and a fifth chamber (156) is provided around the fifth connection area (154). The fourth chamber (155) and the fifth chamber (156) are in communication. A fourth opening (157) is provided on the fourth chamber (155). A fifth opening (158) is provided on the side of the fifth chamber (156) away from the fourth connection area (153).

2. The battery pack according to claim 1, characterized in that, A flat, hollow metal part is pressed down from both sides, causing the top plate of the metal part to contact the bottom plate to form a first contact position. The first contact position forms a first connecting area (141) and a second connecting area (142). A first chamber (144) and a second chamber (145) are formed around the first contact position. The metal part is pressed down and up from the middle, causing the top plate of the metal part to contact the bottom plate to form a second contact position. The second contact position forms the third connecting area (143). A third chamber (146) is formed around the second contact position.

3. The battery pack according to claim 1, characterized in that, The first connecting area (141) and the second connecting area (142) are both circular. The first chamber (144) and the second chamber (145) are arc-shaped away from the third connecting area (143). The third connecting area (143) is rectangular. The part of the first chamber (144) near the third connecting area (143) is completely connected to the third chamber (146). The part of the second chamber (145) near the third connecting area (143) is completely connected to the third chamber (146).

4. The battery pack according to claim 1, characterized in that, A flat, hollow metal part is pressed down from one side, causing the top plate of the metal part to contact the bottom plate to form a third contact position. The third contact position forms the fourth connection area (153), and the fourth chamber (155) is formed around the third contact position. The metal part is pressed down and up from the middle, causing the top plate of the metal part to contact the bottom plate to form a fourth contact position. The fourth contact position forms the fifth connection area (154), and the fifth chamber (156) is formed around the fourth contact position. The fifth opening (158) is circular and is used to connect to an external pipe.

5. The battery pack according to claim 1, characterized in that, The fourth connecting area (153) is circular, and the part of the fourth chamber (155) away from the fifth connecting area (154) is arc-shaped; the fifth connecting area (154) is rectangular, and the part of the fourth chamber (155) near the fifth connecting area (154) is completely connected to the fifth chamber (156).

6. The battery pack according to claim 1, characterized in that, The fifth opening (158) is connected to the conductive tube (200) via a liquid-cooled connection assembly (170).

7. The battery pack according to claim 6, characterized in that, The liquid-cooled connection assembly (170) includes a conductive sleeve (171) fixed on the fifth opening (158), an insulating base (172) sleeved on the conductive sleeve (171), an external thread (1723) on the outer wall of the insulating base (172), a conductive insertion tube (173) connected to the conductive tube (200) and insertable into the conductive sleeve (171), a locking member (174) on the conductive insertion tube (173), and an internal thread (1743) on the locking member (174) that mates with the external thread (1723). The internal thread (1743) and the external thread (1723) are locked together so that the conductive insertion tube (173) is fixed inside the conductive sleeve (171). The conductive sleeve (171) and the conductive insertion tube (173) are connected and can be energized.

8. The battery pack according to claim 7, characterized in that, A first positioning protrusion (1711) is formed inwardly protruding from the inner wall of the conductive sleeve (171). A first conical surface (1712) is set on the side of the first positioning protrusion (1711) near the conductive insertion tube (173). A second conical surface (1731) is formed inwardly at the end of the conductive insertion tube (173) near the first positioning protrusion (1711). The first conical surface (1712) and the second conical surface (1731) are in contact.

9. The battery pack according to claim 8, characterized in that, At least one first positioning groove (1713) is provided on the inner wall of the conductive sleeve (171), and a helical spring (175) is provided in the first positioning groove (1713).

10. The battery pack according to claim 8, characterized in that, A third positioning groove (1715) is provided on the inner wall of the conductive sleeve (171), and a sealing ring is provided in the third positioning groove (1715).

11. The battery pack according to claim 8, characterized in that, A push ring (1732) extends radially outward from the outer wall of the conductive insertion tube (173). The locking member (174) abuts against the push ring (1732). Through the cooperation of the internal thread (1743) and the external thread (1723), the locking member (174) pushes the conductive insertion tube (173) into the conductive sleeve (171).

12. The battery pack according to claim 11, characterized in that, A limiting ring (1733) extends radially outward from the outer wall of the conductive insertion tube (173), and a limiting gap (1734) is formed between the pushing ring (1732) and the limiting ring (1733), and the locking member (174) is engaged in the limiting gap (1734).

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