Battery and electric device

Abstract

The application relates to the battery technical field and provides a battery and a power utilization device, wherein the battery comprises an upper liquid cooling plate and a lower liquid cooling plate, the upper liquid cooling plate and the lower liquid cooling plate are respectively provided with first liquid cooling channels and second liquid cooling channels, and a battery cell assembly comprises a plurality of battery cells, the battery cells are internally provided with hollow channels, the plurality of battery cells are located between the upper liquid cooling plate and the lower liquid cooling plate, and the first liquid cooling channels and the second liquid cooling channels are respectively connected with the hollow channels of each battery cell. According to the technical scheme, the battery cells are internally provided with the hollow channels, the two ends of the hollow channels are respectively connected with the first liquid cooling channels and the second liquid cooling channels, the heat exchange efficiency of the battery cells is improved, and the safety performance of the battery is further improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery and an electrical device. Background Technology

[0002] A battery module can include several to a dozen cell units. Since each cell unit generates heat, it is necessary to effectively dissipate the heat generated by each cell unit in a module that includes multiple cell units.

[0003] In existing power battery cooling systems, coolant cools the sides of the battery cells through liquid cooling pipes. Since the coolant passes through these pipes, which are in contact with the cells via thermally conductive adhesive, the heat from the coolant travels through the cooling pipes and the thermally conductive adhesive / gel before finally being conducted to the cell casing. This process results in low heat transfer efficiency due to two layers of degradation. Summary of the Invention

[0004] The purpose of this application is to provide a battery and an electrical device that improves the heat exchange efficiency of the battery cell and further enhances the safety performance of the battery.

[0005] In a first aspect, embodiments of this application provide a battery, including: an upper liquid cooling plate and a lower liquid cooling plate, wherein the upper liquid cooling plate and the lower liquid cooling plate are respectively provided with a first liquid cooling channel and a second liquid cooling channel; a cell assembly, wherein the cell assembly includes a plurality of cells, wherein each cell is provided with a hollow channel, and the plurality of cells are located between the upper liquid cooling plate and the lower liquid cooling plate, wherein the first liquid cooling channel and the second liquid cooling channel are respectively connected to the hollow channel of each cell.

[0006] In the above implementation process, each battery cell has a hollow channel inside. Upper and lower liquid cooling plates are used for heat exchange within the cell. The first and second liquid cooling channels are used for the flow of the heat exchange medium, which can be coolant or water, etc. The heat exchange medium can cool or heat the battery cell. The two ends of the hollow channel are connected to the first liquid cooling channel in the upper liquid cooling plate and the second liquid cooling channel in the lower liquid cooling plate, respectively. This allows the heat exchange medium to exchange heat with the battery cell as it flows from the first liquid cooling channel through the hollow channel to the second liquid cooling channel, or vice versa, improving heat exchange efficiency and further ensuring battery safety.

[0007] For example, the heat exchange medium flows in from the lower liquid cooling plate and flows out through the upper liquid cooling plate. The purpose of this arrangement is to allow the heat exchange medium to fill the lower liquid cooling plate first. When the lower liquid cooling plate is full, the heat exchange medium overcomes its own gravity through the pumping equipment, and fully contacts the battery cell through the hollow channel to exchange heat with the battery cell. It then flows into the upper liquid cooling plate and flows out through the first liquid cooling channel, thereby completing the heat exchange cycle, improving the heat exchange effect, and protecting the battery's safety.

[0008] In one possible implementation, the upper liquid cooling plate has a plurality of first limiting members at one end facing the lower liquid cooling plate, and the lower liquid cooling plate has a plurality of second limiting members at one end facing the upper liquid cooling plate. The positions of the plurality of first limiting members and the plurality of second limiting members correspond one-to-one. A first chamber is provided in the first limiting member, and a second chamber is provided in the second limiting member. The two ends of the battery cell are respectively connected to the first limiting member and the second limiting member. The two ends of the first chamber are respectively connected to one end of the first liquid cooling channel and the hollow channel, and the two ends of the second chamber are respectively connected to the other end of the second liquid cooling channel and the hollow channel.

[0009] In the above implementation process, multiple first limiting members are provided on the upper liquid cooling plate, and multiple second limiting members are provided on the lower liquid cooling plate. The first limiting members and the second limiting members have the same structure, so that the upper liquid cooling plate and the lower liquid cooling plate have the same structure. During production, only one mold is needed. In addition, the positions of the multiple first limiting members and the multiple second limiting members correspond one-to-one. The two ends of the battery cell are respectively inserted into the first limiting members and the second limiting members. The first limiting members and the second limiting members limit and fix the battery cell, preventing the battery cell from shaking between the upper liquid cooling plate and the lower liquid cooling plate, and improving the stability of the battery cell.

[0010] In the above implementation process, the first limiting member is provided with a first chamber, one end of which is connected to one end of the hollow channel and the other end of which is connected to the first liquid cooling channel. The second limiting member is provided with a second chamber, one end of which is connected to the second liquid cooling channel and the other end of which is connected to the other end of the hollow channel. This allows the heat exchange medium to flow from the first liquid cooling channel through the first chamber, the hollow channel, and the second chamber into the second liquid cooling channel, or from the second liquid cooling channel through the second chamber, the hollow channel, and the first chamber into the first liquid cooling channel, and the flow is smoother.

[0011] For example, multiple first limiting components are integrally formed with the upper liquid cooling plate, and multiple second limiting components are integrally formed with the lower liquid cooling plate. The positions of the multiple first limiting components and the multiple second limiting components correspond one-to-one, so that the upper liquid cooling plate and the lower liquid cooling plate share the same mold, eliminating the need for additional model development and saving costs.

[0012] In one possible implementation, the first limiting member has a first annular groove at one end facing the battery cell, and the second limiting member has a second annular groove at the other end facing the battery cell; both ends of the battery cell are provided with insulating pads, and both ends of the insulating pads are provided with annular protrusions that are inserted into and cooperate with the first annular groove and the second annular groove.

[0013] In the above implementation process, a first annular groove is provided at one end of the first limiting member facing the battery cell, and a second annular groove is provided at the other end of the second limiting member facing the battery cell. The annular protrusions on the insulating pads at both ends of the battery cell are respectively inserted and engaged with the first annular groove and the second annular groove, thereby realizing the connection between the battery cell and the first limiting member and the second limiting member respectively. This further realizes the connection between the first limiting member and the second limiting member and the hollow channel. In addition, the positions of the first limiting member and the second limiting member correspond to each other, making it easier for the battery cell to be inserted with the first limiting member and the second limiting member.

[0014] For example, the first limiting member is a column, and the second limiting member is also a column. The first limiting member protrudes towards the lower liquid cooling plate, and the second limiting member protrudes towards the upper liquid cooling plate. The insulating gasket is an annular structure with an annular groove. The annular groove includes an outer peripheral wall and an inner peripheral wall. The inner peripheral wall is an annular protrusion. The annular protrusions at both ends of the battery cell are inserted into the first annular groove and the second annular groove, respectively, thereby realizing the connection between the battery cell and the first limiting member and the second limiting member.

[0015] In one possible implementation, a sealing gasket is embedded in both the first annular groove and the second annular groove, and the annular protrusions at both ends of the battery cell are respectively inserted into the first annular groove and the second annular groove, and abut against the sealing gasket.

[0016] In the above implementation process, by providing sealing gaskets in both the first and second annular grooves, when the annular protrusions at both ends of the battery cell are inserted into the first and second annular grooves respectively, they abut against the sealing gaskets. The sealing gaskets improve the sealing effect at the connection points between the annular protrusions at both ends of the battery cell and the first and second annular grooves respectively, preventing the heat exchange medium from leaking from the connection points at both ends of the battery cell, and further improving the safety performance of the battery.

[0017] For example, the annular protrusions and the insulating gaskets are integrally formed. When the annular protrusions at both ends of the battery cell are inserted into the first annular groove and the second annular groove respectively, the leakage can be further prevented and the sealing performance can be improved by adhesive bonding.

[0018] In one possible implementation, the upper liquid cooling plate has a plurality of first liquid cooling through holes, which are respectively connected to the first liquid cooling channel; the lower liquid cooling plate has a plurality of second liquid cooling through holes, which are connected to the second liquid cooling channel; one end of the first chamber is connected to the first liquid cooling through hole, and the other end is connected to one end of the hollow channel; one end of the second chamber is connected to the second liquid cooling through hole, and the other end is connected to the other end of the hollow channel.

[0019] In the above implementation process, the upper liquid cooling plate is provided with multiple first liquid cooling through holes, which are connected to the first liquid cooling channel. Similarly, the lower liquid cooling plate is provided with multiple second liquid cooling through holes, each of which is connected to the second liquid cooling channel. Since the two ends of the first chamber are respectively connected to the first liquid cooling through holes and one end of the hollow channel, the heat exchange medium can flow from the first liquid cooling channel into the hollow channel. Similarly, the two ends of the second chamber are respectively connected to the second liquid cooling through holes and the other end of the hollow channel, so that the heat exchange medium in the hollow channel can flow from the hollow channel into the second liquid cooling channel. Of course, the flow direction of the heat exchange medium can also be from the second liquid cooling channel into the first liquid cooling channel.

[0020] In one possible implementation, the first chamber has a gradually increasing cross-sectional area from one end connected to the hollow channel to the other; the second chamber has a gradually decreasing cross-sectional area from one end connected to the hollow channel to the other.

[0021] In the above implementation process, the first chamber has a frustum-shaped structure, and the cross-sectional area of ​​the first chamber gradually increases from one end connected to the hollow channel to the other end, so that the heat exchange medium can flow smoothly from the hollow channel into the first liquid cooling channel, reducing the flow resistance of the heat exchange medium. Similarly, the second chamber also has a frustum-shaped structure, and the cross-sectional area of ​​the second chamber gradually increases from one end connected to the hollow channel to the other end, so that the heat exchange medium can flow smoothly from the second liquid cooling channel into the hollow channel or from the hollow channel into the second liquid cooling channel. Furthermore, when the heat exchange medium flows from the second liquid cooling channel into the hollow channel, the second chamber will act as a confluencer, and the heat exchange medium will gradually converge into the hollow channel, increasing the flow rate of the heat exchange medium and improving the heat exchange effect. Similarly, when the heat exchange medium flows from the first liquid cooling channel into the hollow channel, the first chamber will also act as a confluencer, and its function is the same as that of the second chamber, which will not be elaborated here.

[0022] In one possible implementation, the first limiting member has a first annular sealing gasket at one end facing the battery cell, the inner diameter of the first annular sealing gasket being adapted to the inner diameter of the hollow channel; the second limiting member has a second annular sealing gasket at the other end facing the battery cell, the inner diameter of the second annular sealing gasket being adapted to the inner diameter of the hollow channel.

[0023] In the above implementation process, a first annular sealing gasket is provided at one end of the first limiting member facing the battery cell, and a second annular sealing gasket is provided at the other end of the second limiting member facing the battery cell. The first annular sealing gasket and the second annular sealing gasket are respectively adapted to the inner diameter of the hollow channel. When the two ends of the battery cell are respectively inserted and engaged with the first limiting member and the second limiting member, the first annular sealing gasket and the second annular sealing gasket can seal the insertion position of the battery cell with the first limiting member and the second limiting member, avoid leakage of heat exchange medium, and further improve the safety performance of the battery.

[0024] For example, the first annular sealing gasket is located at the end of the first limiting member, and the second annular sealing gasket is located at the end of the second limiting member. When the two ends of the battery cell are respectively inserted into the first limiting member and the second limiting member, the two end faces of the first annular sealing gasket are respectively attached to the end of the first limiting member and the end of the hollow channel, and the two end faces of the second annular sealing gasket are respectively attached to the end of the second limiting member and the other end of the hollow channel, thereby achieving a sealing effect. In order to improve the sealing effect, the joint is glued to avoid leakage of heat exchange medium.

[0025] In one possible implementation, a positive terminal is provided at one end of the battery cell and a negative terminal is provided at the other end. The positive terminal and the negative terminal are respectively located on one side of the insulating pads at both ends. One of the positive terminal and the negative terminal is engaged with the outer peripheral side of the first limiting member, and the other is engaged with the outer peripheral side of the second limiting member.

[0026] In the above implementation process, the two ends of the battery cell are respectively provided with a positive terminal and a negative terminal. The positive terminal is located on the side of the insulating pad at one end of the battery cell facing the upper liquid cooling plate, and the negative terminal is located on the side of the insulating pad at the other end of the battery cell facing the lower liquid cooling plate. When the two ends of the battery cell are inserted into the first limiting member and the second limiting member respectively, the positive terminal is engaged with the outer periphery of the first limiting member, and the negative terminal is engaged with the outer periphery of the second limiting member. Of course, the insertion direction of the battery cell into the first limiting member and the second limiting member can be opposite, that is, the end of the battery cell with the positive terminal is inserted into the lower liquid cooling plate, and the end with the negative terminal is inserted into the upper liquid cooling plate.

[0027] For example, both the positive and negative terminals are annular structures, respectively fitted around the annular protrusions of the insulating pads at both ends.

[0028] In one possible implementation, the inner peripheral wall of the hollow channel is provided with an insulating layer.

[0029] In the above implementation process, the inner peripheral wall of the hollow channel inside the battery cell is provided with an insulating layer. When the heat exchange medium flows in the hollow channel, the insulating layer insulates and isolates the battery cell from the heat exchange medium, preventing the heat exchange medium from conducting electricity with the battery cell and improving the safety performance of the battery.

[0030] Secondly, embodiments of this application provide an electrical device including the battery described in the first aspect, for providing electrical energy to the electrical device.

[0031] In the above process, the battery provides electrical energy to the electrical device, enabling the device to operate normally. The electrical device can be a car or a ship, etc.

[0032] For example, the electrical device also includes a pumping device that provides circulation power for the heat exchange medium. One side of both the upper and lower liquid cooling plates has an opening, while the other side is sealed. One end of the inlet pipe is connected to the pumping device, and the other end is connected to the opening of the lower liquid cooling plate. One end of the outlet pipe is connected to the opening of the upper liquid cooling plate, and the other end is connected to the pumping device, allowing the heat exchange medium to flow from the lower liquid cooling plate into the upper liquid cooling plate. The advantage of this arrangement is that the heat exchange medium can fill the lower liquid cooling plate, overcome its own gravity, and then gradually rise from the hollow channel into the upper liquid cooling plate, and then flow from the upper liquid cooling plate into the pumping device, thus completing one cooling cycle. Alternatively, the heat exchange medium can flow from the upper liquid cooling plate into the hollow channel and then into the lower liquid cooling plate, thus completing one cycle. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 An exploded structural diagram of a battery provided in an embodiment of this application;

[0035] Figure 2 An exploded structural diagram of a battery provided in an embodiment of this application from another perspective;

[0036] Figure 3 This is a three-dimensional structural diagram of the battery cell assembly provided in the embodiments of this application;

[0037] Figure 4 A top view of the battery cell assembly provided in an embodiment of this application;

[0038] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the GG direction;

[0039] Figure 6 This is a schematic diagram of the structure of the second limiting member provided in the embodiments of this application;

[0040] Figure 7 A schematic diagram of the battery structure from one perspective, provided in an embodiment of this application;

[0041] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the FF direction.

[0042] Icons: 1-Upper liquid cooling plate; 11-First liquid cooling channel; 12-First liquid cooling through hole; 2-Lower liquid cooling plate; 21-Second liquid cooling channel; 22-Second liquid cooling through hole; 3-Battery cell; 31-Hollow channel; 32-Insulating gasket; 33-Annular protrusion; 4-First limiting component; 41-First chamber; 5-Second limiting component; 51-Second chamber; 52-Second annular groove; 6-Sealing gasket; 7-First annular sealing gasket; 8-Second annular sealing gasket; 9-Positive electrode post; 10-Negative electrode post. Detailed Implementation

[0043] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0044] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] like Figure 1 , 2 As shown in Figure 8, this application provides a battery, including: an upper liquid cooling plate 1 and a lower liquid cooling plate 2, wherein the upper liquid cooling plate 1 and the lower liquid cooling plate 2 are respectively provided with a first liquid cooling channel 11 and a second liquid cooling channel 21; a cell assembly, the cell assembly including a plurality of cells 3, wherein the cells 3 are provided with a hollow channel 31, and the plurality of cells 3 are all located between the upper liquid cooling plate 1 and the lower liquid cooling plate 2, wherein the first liquid cooling channel 11 and the second liquid cooling channel 21 are respectively connected to the hollow channel 31 of each cell 3.

[0046] In the above implementation process, each battery cell 3 is provided with a hollow channel 31. The upper liquid cooling plate 1 and the lower liquid cooling plate 2 are used for heat exchange of the battery cell 3. The first liquid cooling channel 11 and the second liquid cooling channel 21 are used for the flow of heat exchange medium, which can be coolant or water, etc. The heat exchange medium can cool down the battery cell 3 or heat it up. The two ends of the hollow channel 31 are connected to the first liquid cooling channel 11 in the upper liquid cooling plate 1 and the second liquid cooling channel 21 in the lower liquid cooling plate 2, respectively. This allows the heat exchange medium to exchange heat with the battery cell 3 during the process of the heat exchange medium flowing from the first liquid cooling channel 11 through the hollow channel 31 to the second liquid cooling channel 21, or from the second liquid cooling channel 21 through the hollow channel 31 to the first liquid cooling channel 11, thereby improving heat exchange efficiency and further ensuring the safety performance of the battery.

[0047] For example, the heat exchange medium flows in from the lower liquid cooling plate 2 and flows out through the upper liquid cooling plate 1. The purpose of this arrangement is to allow the heat exchange medium to fill the lower liquid cooling plate 2 first. When the lower liquid cooling plate 2 is full, the heat exchange medium overcomes its own gravity through the pumping equipment and fully contacts the battery cell 3 through the hollow channel 31 to exchange heat with the battery cell 3. It then flows into the upper liquid cooling plate 1 and flows out through the first liquid cooling channel 11, thereby completing the heat exchange cycle, improving the heat exchange effect, and protecting the safety of battery use.

[0048] like Figure 1 , 2 As shown in Figures 6 and 7, in some embodiments, the upper liquid cooling plate 1 is provided with a plurality of first limiting members 4 at one end facing the lower liquid cooling plate 2, and the lower liquid cooling plate 2 is provided with a plurality of second limiting members 5 at one end facing the upper liquid cooling plate 1. The positions of the plurality of first limiting members 4 and the plurality of second limiting members 5 correspond one-to-one. A first chamber 41 is provided inside the first limiting member 4, and a second chamber 51 is provided inside the second limiting member 5. The two ends of the battery cell 3 are respectively connected to the first limiting member 4 and the second limiting member 5. The two ends of the first chamber 41 are respectively connected to one end of the first liquid cooling channel 11 and the hollow channel 31, and the two ends of the second chamber 51 are respectively connected to the other end of the second liquid cooling channel 21 and the hollow channel 31.

[0049] In the above implementation process, multiple first limiting members 4 are provided on the upper liquid cooling plate 1, and multiple second limiting members 5 are provided on the lower liquid cooling plate 2. The first limiting members 4 and the second limiting members 5 have the same structure, so that the upper liquid cooling plate 1 and the lower liquid cooling plate 2 have the same structure. During production and manufacturing, only one mold is needed. In addition, the positions of the multiple first limiting members 4 and the multiple second limiting members 5 correspond one-to-one. The two ends of the battery cell 3 are respectively inserted into the first limiting members 4 and the second limiting members 5. The first limiting members 4 and the second limiting members 5 limit and fix the battery cell 3, preventing the battery cell 3 from shaking between the upper liquid cooling plate 1 and the lower liquid cooling plate 2, and improving the stability of the battery cell 3.

[0050] The first limiting member 4 has a first chamber 41, one end of which is connected to one end of the hollow channel 31 and the other end of which is connected to the first liquid cooling channel 11. The second limiting member 5 has a second chamber 51, one end of which is connected to the second liquid cooling channel 21 and the other end of which is connected to the other end of the hollow channel 31. This allows the heat exchange medium to flow from the first liquid cooling channel 11 through the first chamber 41, the hollow channel 31, and the second chamber 51 into the second liquid cooling channel 21, or from the second liquid cooling channel 21 through the second chamber 51, the hollow channel 31, and the first chamber 41 into the first liquid cooling channel 11, and the flow is smoother.

[0051] For example, multiple first limiting members 4 are integrally formed with the upper liquid cooling plate 1, and multiple second limiting members 5 are integrally formed with the lower liquid cooling plate 2. The positions of the multiple first limiting members 4 and the multiple second limiting members 5 correspond one-to-one, so that the upper liquid cooling plate 1 and the lower liquid cooling plate 2 share the same mold, eliminating the need for additional model development and saving costs.

[0052] Figure 6 The structure shown is that of the second limiting member 5, and the first limiting member 4 has the same structure.

[0053] like Figures 1 to 3 As shown in Figures 5 and 8, in some embodiments, the first limiting member 4 is provided with a first annular groove at one end facing the battery cell 3, and the second limiting member 5 is provided with a second annular groove 52 at the other end facing the battery cell 3; both ends of the battery cell 3 are provided with insulating pads 32, and both ends of the insulating pads 32 are provided with annular protrusions 33 that are inserted and cooperate with the first annular groove and the second annular groove 52.

[0054] In the above implementation process, the first limiting member 4 is provided with a first annular groove at one end facing the battery cell 3, and the second limiting member 5 is provided with a second annular groove 52 at the other end facing the battery cell 3. The annular protrusions 33 on the insulating pads 32 at both ends of the battery cell 3 are respectively inserted and engaged with the first annular groove and the second annular groove 52, thereby realizing the connection between the battery cell 3 and the first limiting member 4 and the second limiting member 5 respectively, and further realizing the connection between the first limiting member 4 and the second limiting member 5 and the hollow channel 31. In addition, the positions of the first limiting member 4 and the second limiting member 5 correspond, making it easier for the battery cell 3 to be inserted with the first limiting member 4 and the second limiting member 5.

[0055] For example, the first limiting member 4 is a column, and the second limiting member 5 is also a column. The first limiting member 4 protrudes towards the lower liquid cooling plate 2, and the second limiting member 5 protrudes towards the upper liquid cooling plate 1. The insulating gasket 32 ​​has an annular structure with an annular groove. The annular groove includes an outer peripheral wall and an inner peripheral wall. The inner peripheral wall is an annular protrusion 33. The annular protrusions 33 at both ends of the battery cell 3 are inserted into the first annular groove and the second annular groove 52, thereby realizing the connection between the battery cell 3 and the first limiting member 4 and the second limiting member 5.

[0056] like Figure 8 As shown, in some embodiments, sealing gaskets 6 are embedded in both the first annular groove and the second annular groove 52, and the annular protrusions 33 at both ends of the battery cell 3 are respectively inserted into the first annular groove and the second annular groove 52 and abut against the sealing gaskets 6.

[0057] In the above implementation process, by providing sealing gaskets 6 in both the first annular groove and the second annular groove 52, when the annular protrusions 33 at both ends of the battery cell 3 are inserted into the first annular groove and the second annular groove 52 respectively, they abut against the sealing gaskets 6. The sealing gaskets 6 improve the sealing effect at the connection positions of the annular protrusions 33 at both ends of the battery cell 3 with the first annular groove and the second annular groove 52 respectively, preventing the heat exchange medium from leaking from the connection positions at both ends of the battery cell 3, and further improving the safety performance of the battery.

[0058] For example, the annular protrusion 33 and the insulating gasket 32 ​​are integrally formed. When the annular protrusions 33 at both ends of the battery cell 3 are inserted into the first annular groove and the second annular groove 52 respectively, the leakage can be further prevented and the sealing performance can be improved by adhesive bonding.

[0059] like Figure 8 As shown, in some embodiments, the upper liquid cooling plate 1 has a plurality of first liquid cooling through holes 12, which are respectively connected to the first liquid cooling channel; the lower liquid cooling plate 2 has a plurality of second liquid cooling through holes 22, which are connected to the second liquid cooling channel 21; one end of the first chamber 41 is connected to the first liquid cooling through hole 12, and the other end is connected to one end of the hollow channel 31; one end of the second chamber 51 is connected to the second liquid cooling through hole 22, and the other end is connected to the other end of the hollow channel 31.

[0060] In the above implementation process, the upper liquid cooling plate 1 is provided with a plurality of first liquid cooling through holes 12, which are connected to the first liquid cooling channel 11. Similarly, the lower liquid cooling plate 2 is provided with a plurality of second liquid cooling through holes 22, each of which is connected to the second liquid cooling channel 21. Since the two ends of the first chamber 41 are respectively connected to the first liquid cooling through holes 12 and one end of the hollow channel 31, the heat exchange medium can flow from the first liquid cooling channel 11 into the hollow channel 31. Similarly, the two ends of the second chamber 51 are respectively connected to the second liquid cooling through holes 22 and the other end of the hollow channel 31, so that the heat exchange medium in the hollow channel 31 can flow from the hollow channel 31 into the second liquid cooling channel 21. Of course, the flow direction of the heat exchange medium can also be from the second liquid cooling channel 21 into the first liquid cooling channel 11.

[0061] In some embodiments, the cross-sectional area of ​​the first chamber 41 gradually increases from one end connected to the hollow channel 31 to the other end; the cross-sectional area of ​​the second chamber 51 gradually decreases from one end connected to the hollow channel 31 to the other end.

[0062] In the above implementation process, the first chamber 41 has a frustum-shaped structure, and the cross-sectional area of ​​the end of the first chamber 41 connected to the hollow channel 31 gradually increases towards the other end, so that the heat exchange medium can flow smoothly from the hollow channel 31 into the first liquid cooling channel 11, reducing the flow resistance of the heat exchange medium. Similarly, the second chamber 51 also has a frustum-shaped structure, and the cross-sectional area of ​​the end of the second chamber 51 connected to the hollow channel 31 gradually increases towards the other end, so that the heat exchange medium can flow smoothly from the second liquid cooling channel 21. The heat exchange medium flows into the hollow channel 31 or from the hollow channel 31 into the second liquid cooling channel 21. When the heat exchange medium flows from the second liquid cooling channel 21 into the hollow channel 31, the second chamber 51 will act as a confluencer, and the heat exchange medium will gradually converge into the hollow channel 31, increasing the flow rate of the heat exchange medium and improving the heat exchange effect. Similarly, when the heat exchange medium flows from the first liquid cooling channel 11 into the hollow channel 31, the first chamber 41 will also act as a confluencer, and its function is the same as that of the second chamber 51, which will not be described in detail here.

[0063] like Figure 6 , 8 As shown, in some embodiments, a first annular sealing gasket 7 is provided at one end of the first limiting member 4 facing the battery cell 3, and the inner diameter of the first annular sealing gasket 7 is adapted to the inner diameter of the hollow channel 31; a second annular sealing gasket 8 is provided at the other end of the second limiting member 5 facing the battery cell 3, and the inner diameter of the second annular sealing gasket 8 is adapted to the inner diameter of the hollow channel 31.

[0064] In the above implementation process, a first annular sealing gasket 7 is provided at one end of the first limiting member 4 facing the battery cell 3, and a second annular sealing gasket 8 is provided at the other end of the second limiting member 5 facing the battery cell 3. The first annular sealing gasket 7 and the second annular sealing gasket 8 are respectively adapted to the inner diameter of the hollow channel 31. When the two ends of the battery cell 3 are respectively inserted and engaged with the first limiting member 4 and the second limiting member 5, the first annular sealing gasket 7 and the second annular sealing gasket 8 can seal the insertion position of the battery cell 3 with the first limiting member 4 and the second limiting member 5, avoid leakage of heat exchange medium, and further improve the safety performance of the battery.

[0065] For example, the first annular sealing gasket 7 is located at the end of the first limiting member 4, and the second annular sealing gasket 8 is located at the end of the second limiting member 5. When the two ends of the battery cell 3 are respectively inserted into the first limiting member 4 and the second limiting member 5, the two end faces of the first annular sealing gasket 7 are respectively attached to the end of the first limiting member 4 and the end of the hollow channel 31, and the two end faces of the second annular sealing gasket 8 are respectively attached to the end of the second limiting member 5 and the other end of the hollow channel 31, thereby achieving a sealing effect. In order to improve the sealing effect, the joint is glued to avoid leakage of heat exchange medium.

[0066] In some embodiments, one end of the battery cell 3 is provided with a positive terminal post 9 and the other end is provided with a negative terminal post 10. The positive terminal post 9 and the negative terminal post 10 are respectively located on one side of the insulating pads 32 at both ends. One of the positive terminal post 9 and the negative terminal post 10 is engaged with the outer peripheral side of the first limiting member 4, and the other is engaged with the outer peripheral side of the second limiting member 5.

[0067] In the above implementation process, the two ends of the battery cell 3 are respectively provided with a positive terminal 9 and a negative terminal 10. The positive terminal 9 is located on the side of the insulating pad 32 at one end of the battery cell 3 facing the upper liquid cooling plate 1, and the negative terminal 10 is located on the side of the insulating pad 32 at the other end of the battery cell 3 facing the lower liquid cooling plate 2. When the two ends of the battery cell 3 are respectively inserted into the first limiting member 4 and the second limiting member 5, the positive terminal 9 is engaged with the outer periphery of the first limiting member 4, and the negative terminal 10 is engaged with the outer periphery of the second limiting member 5. Of course, the insertion direction of the battery cell 3 into the first limiting member 4 and the second limiting member 5 can be opposite, that is, the end of the battery cell 3 with the positive terminal 9 is inserted into the lower liquid cooling plate 2, and the end with the negative terminal 10 is inserted into the upper liquid cooling plate 1.

[0068] For example, both the positive terminal 9 and the negative terminal 10 are annular structures, respectively fitted around the annular protrusions 33 of the insulating pads 32 at both ends.

[0069] In some embodiments, the inner peripheral wall of the hollow channel 31 is provided with an insulating layer.

[0070] In the above implementation process, the inner peripheral wall of the hollow channel 31 in the cell 3 is provided with an insulating layer. When the heat exchange medium flows in the hollow channel 31, the insulating layer insulates and isolates the cell 3 from the heat exchange medium, preventing the heat exchange medium from conducting electricity with the cell 3 and improving the safety performance of the battery.

[0071] In some embodiments, multiple aluminum busbars are respectively provided at both ends of the battery cell assembly, and the multiple aluminum busbars connect multiple battery cells in series and parallel, thereby assembling multiple battery cells into a battery.

[0072] In one connection method, the aluminum busbar is provided with a through hole, the diameter of which is the same as the outer diameter of the pole post, so that the aluminum busbar can be sleeved on the outer circumference of the pole post through the through hole, and the battery cell 3 and the aluminum busbar can be electrically connected by welding.

[0073] In one embodiment, the aluminum busbar is provided with multiple through holes, through which multiple terminals on the same side of multiple battery cells 3 are passed, thereby realizing the electrical connection between the aluminum busbar and multiple battery cells 3.

[0074] In one embodiment, in order to meet the flow area requirement of the aluminum busbar, a flange is provided on the aluminum busbar along the circumferential direction of the through hole. When the aluminum busbar is electrically connected to the electrode post, the flange is fitted to the outer periphery of the electrode post, thereby increasing the flow area of ​​the aluminum busbar.

[0075] In one embodiment, both the upper liquid cooling plate 1 and the lower liquid cooling plate 2 are made of insulating material to avoid electrical conductivity with the battery cell assembly.

[0076] This application also provides an electrical device, including the battery described above, for providing electrical energy to the electrical device.

[0077] In the above process, the battery provides electrical energy to the electrical device, enabling the device to operate normally. The electrical device can be a car or a ship, etc.

[0078] For example, the electrical device also includes a pumping device that provides circulation power for the heat exchange medium. One side of both the upper liquid cooling plate 1 and the lower cooling plate has an opening, while the other side is sealed. One end of the inlet pipe is connected to the pumping device, and the other end is connected to the opening of the lower liquid cooling plate 2. One end of the outlet pipe is connected to the opening of the upper liquid cooling plate 1, and the other end is connected to the pumping device, allowing the heat exchange medium to flow from the lower liquid cooling plate 2 into the upper liquid cooling plate 1. The advantage of this arrangement is that the heat exchange medium can fill the lower liquid cooling plate 2 completely, overcome its own gravity, and then gradually rise from the hollow channel 31 into the upper liquid cooling plate 1, and then flow from the upper liquid cooling plate 1 into the pumping device, thus completing one cooling cycle. Alternatively, the heat exchange medium can also flow from the upper liquid cooling plate 1 into the hollow channel 31, and then into the lower liquid cooling plate 2, thus completing one cycle.

[0079] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A battery, characterized in that, include: An upper liquid cooling plate and a lower liquid cooling plate are provided, and a first liquid cooling channel and a second liquid cooling channel are respectively provided in the upper liquid cooling plate and the lower liquid cooling plate; A battery cell assembly, comprising multiple battery cells, each battery cell having a hollow channel inside, the multiple battery cells being located between an upper liquid cooling plate and a lower liquid cooling plate, the first liquid cooling channel and the second liquid cooling channel being respectively connected to the hollow channel of each battery cell; The upper liquid cooling plate is provided with a plurality of first limiting members at one end facing the lower liquid cooling plate, and the lower liquid cooling plate is provided with a plurality of second limiting members at one end facing the upper liquid cooling plate, with the positions of the plurality of first limiting members and the plurality of second limiting members corresponding one-to-one. The first limiting member has a first annular groove at one end facing the battery cell, and the second limiting member has a second annular groove at the other end facing the battery cell; Insulating pads are provided at both ends of the battery cell, and each insulating pad at both ends is provided with annular protrusions that are inserted into the first annular groove and the second annular groove. One end of the battery cell is provided with a positive terminal post and the other end is provided with a negative terminal post. The positive terminal post and the negative terminal post are respectively located on one side of the insulating pads at both ends. One of the positive terminal post and the negative terminal post is engaged with the outer peripheral side of the first limiting member, and the other is engaged with the outer peripheral side of the second limiting member. Both the positive and negative terminals are annular structures, and both the positive and negative terminals protrude from the insulating pad along the axial direction of the battery cell.

2. The battery according to claim 1, characterized in that, The first limiting member has a first chamber, and the second limiting member has a second chamber. The two ends of the battery cell are connected to the first limiting member and the second limiting member, respectively. The two ends of the first chamber are connected to one end of the first liquid cooling channel and one end of the hollow channel, respectively. The two ends of the second chamber are connected to the other end of the second liquid cooling channel and the hollow channel, respectively.

3. The battery according to claim 1, characterized in that, Both the first annular groove and the second annular groove are fitted with sealing gaskets. The annular protrusions at both ends of the battery cell are respectively inserted into the first annular groove and the second annular groove, and abut against the sealing gaskets.

4. The battery according to claim 2, characterized in that, The upper liquid cooling plate has a plurality of first liquid cooling through holes, which are respectively connected to the first liquid cooling channel; the lower liquid cooling plate has a plurality of second liquid cooling through holes, which are connected to the second liquid cooling channel. One end of the first chamber is connected to the first liquid cooling through hole, and the other end is connected to one end of the hollow channel; One end of the second chamber is connected to the second liquid cooling through hole, and the other end is connected to the other end of the hollow channel.

5. The battery according to claim 4, characterized in that, The first chamber has a gradually increasing cross-sectional area from one end connected to the hollow channel to the other end; The cross-sectional area of ​​the second chamber gradually decreases from one end connected to the hollow channel to the other end.

6. The battery according to claim 5, characterized in that, The first limiting member has a first annular sealing gasket at one end facing the battery cell, and the inner diameter of the first annular sealing gasket is adapted to the inner diameter of the hollow channel. The second limiting member has a second annular sealing gasket at the other end facing the battery cell, and the inner diameter of the second annular sealing gasket is adapted to the inner diameter of the hollow channel.

7. The battery according to any one of claims 1 to 3, characterized in that, The inner circumferential wall of the hollow channel is provided with an insulating layer.

8. An electrical device, characterized in that, The battery includes any one of claims 1 to 7, for providing electrical energy to an electrical device.

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