Battery pack

Abstract

The utility model discloses a battery pack which comprises a battery cell, the battery cell comprises a plurality of rows of sub-battery cells which are arranged at intervals along a first direction, each row of sub-battery cells comprises a plurality of sub-battery cells which are arranged along a second direction and are connected, and the sub-battery cells are provided with exhaust valves; the cold plate extends in a winding manner in the first direction to form a plurality of mounting spaces which are arranged at intervals in the first direction, the plurality of mounting spaces are in one-to-one correspondence with the plurality of rows of sub-cells, one of the two ends, in the second direction, of each mounting space is opened to form an opening, and the openings of every two adjacent mounting spaces are located at the two ends in the second direction respectively; an exhaust channel and a cooling channel which are spaced in the third direction are formed in the cold plate, the exhaust valve communicates with the exhaust channel, and the first direction, the second direction and the third direction are perpendicular to one another; the battery cell and the cold plate are arranged in the shell and are connected with the shell. According to the battery pack disclosed by the utility model, under the condition that one cold plate is arranged, the contact area between the cold plate and the battery cell is greatly increased, so that the heat exchange effect is improved, the refrigeration effect of the cold plate on the battery cell is improved, the structure is simplified, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack. Background Art

[0002] Existing battery packs mostly use bottom cooling or top and bottom cooling at the same time, and mostly use a square shell battery cell structure for cooling. Single-sided cooling has a poor cooling effect, and double-sided cooling requires the design of two upper and lower cold plate structures, which is more expensive. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery pack, which improves the cooling effect of the cold plate on the battery core, simplifies the structure and reduces the production cost.

[0004] A battery pack according to an embodiment of the utility model includes: a battery cell, wherein the battery cell includes a plurality of rows of sub-battery cells arranged at intervals along a first direction, each row of the sub-battery cells includes a plurality of sub-battery cells arranged and connected along a second direction, and the sub-battery cells have an exhaust valve; a cold plate, wherein the cold plate extends in a winding manner in the first direction to form a plurality of installation spaces arranged at intervals along the first direction, and the plurality of rows of sub-battery cells are arranged in the plurality of installation spaces in a one-to-one correspondence, and one of the two ends of the installation space along the second direction is open to form an open opening, and the open openings of two adjacent installation spaces are respectively located at the two ends of the second direction, and the cold plate has an exhaust channel and a cooling channel spaced apart along a third direction, the exhaust valve is connected to the exhaust channel, and the first direction, the second direction and the third direction are perpendicular to each other; and a shell, wherein the battery cell and the cold plate are both arranged in the shell and are both connected to the shell.

[0005] According to the battery pack of the embodiment of the utility model, the battery cell includes multiple rows of sub-battery cells arranged at intervals along the first direction, and the cold plate extends in a winding manner in the first direction to form multiple installation spaces arranged at intervals along the first direction, and the multiple rows of sub-battery cells are arranged in multiple installation spaces one by one. Therefore, when a cold plate is set, the contact area between the cold plate and the battery cell is greatly increased, thereby improving the heat exchange effect, thereby improving the cooling effect of the cold plate on the battery cell, and at the same time simplifying the structure and reducing the production cost.

[0006] In some embodiments of the present invention, the cold plate includes a plurality of first plates and a plurality of second plates, the plurality of first plates and the second plates are alternately arranged in the first direction and connected end to end to form a peripheral wall of the installation space, the first plates extend along the second direction, the second plates extend along the first direction, the same end of two adjacent first plates along the second direction is respectively connected to two ends of the second plate along the first direction, and two adjacent second plates are respectively connected to the two ends of the first plate along the second direction.

[0007] In some embodiments of the utility model, each of the sub-cells has an exhaust valve at both ends along the first direction, one end or both ends of the first plate along the first direction has a first exhaust hole, the first exhaust hole is connected to the exhaust valve and the exhaust channel, the shell has an explosion-proof valve, and the exhaust channel is connected to the explosion-proof valve.

[0008] In some embodiments of the utility model, the cold plate has a second exhaust hole at one end along the extension direction, a third exhaust hole is provided on the inner peripheral wall of the shell, a connecting channel is provided in the peripheral wall of the shell, the explosion-proof valve is arranged on the outer peripheral wall of the shell, the exhaust channel is connected with the second exhaust hole, the second exhaust hole is connected with the third exhaust hole, the third exhaust hole is connected with the connecting channel, and the explosion-proof valve is connected with the connecting channel.

[0009] In some embodiments of the present invention, the third exhaust hole and the explosion-proof valve are respectively arranged at two ends of the shell along the first direction.

[0010] In some embodiments of the utility model, a fourth exhaust hole is further provided on the inner circumferential wall of the shell, and the fourth exhaust hole and the third exhaust hole are arranged at the same end of the shell along the first direction, and along the first direction, the exhaust valve on the side of the sub-cell closest to the fourth exhaust hole facing the fourth exhaust hole is connected to the fourth exhaust hole, and the fourth exhaust hole is connected to the connecting channel.

[0011] In some embodiments of the present invention, there is a sealing strip between the fourth exhaust hole and the exhaust valve; and / or, there is a sealing strip between the third exhaust hole and the second exhaust hole; and / or, there is a sealing strip between the first exhaust hole and the exhaust valve.

[0012] In some embodiments of the present invention, both ends of the cold plate along the extension direction are connected to the inner peripheral wall of the shell, and one end of the battery cell close to the shell along the third direction is connected to the shell.

[0013] In some embodiments of the present invention, one side of the battery cell along the second direction is spaced apart from the inner peripheral wall of the shell to form a receiving groove, and the receiving groove is used to install circuits and water pipes.

[0014] In some embodiments of the present invention, the shell is connected to the cold plate by fasteners or bonding; and / or, the cold plate is connected to the battery cell by bonding; and / or, the battery cell is connected to the shell by bonding.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a three-dimensional diagram of a battery pack according to an embodiment of the utility model;

[0018] Figure 2 is an exploded view of a battery pack according to an embodiment of the utility model;

[0019] Figure 3 4 is a top view of a battery pack according to an embodiment of the present utility model.

[0020] Reference numerals:

[0021] 10. Battery pack;

[0022] 1. Cold plate; 11. First plate; 12. Second plate; 13. Installation space;

[0023] 2. Shell; 21. Explosion-proof valve; 22. Receiving tank;

[0024] 3. battery cell; 31. sub-battery cell; 311. first sub-battery cell; 312. second sub-battery cell. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Reference below Figure 1-Figure 3 A battery pack 10 according to an embodiment of the present invention is described.

[0029] like Figure 1-Figure 3 As shown, a battery pack 10 according to an embodiment of the present invention includes: a battery cell 3, a cold plate 1 and a shell 2.

[0030] Specifically, refer to Figure 1-Figure 3 , the battery cell 3 includes a first direction (such as Figure 1 The plurality of rows of sub-cells 31 are arranged in a spaced relationship along the second direction (eg, Figure 2 The cold plate 1 extends in a winding manner in the first direction to form a plurality of installation spaces 13 arranged at intervals along the first direction, and the rows of sub-cells 31 are arranged in the plurality of installation spaces 13 in a one-to-one correspondence. Figure 1-Figure 3 In the example shown, the sub-cells 31 are arranged in five rows at intervals along the first direction, and the installation spaces 13 are also arranged in five rows at intervals along the first direction, but the utility model is not limited to this. The number of rows of the sub-cells 31 and the number of installation spaces 13 can be other numbers, such as 3, 4, 6 or 8, etc.

[0031] It can be understood that since the installation space 13 is formed by the cold plate 1 extending in a first direction, the sub-cell 31 is located in the installation space 13, and part of the outer peripheral wall of the sub-cell 31 is in contact with the inner peripheral wall of the installation space 13, so that the cold plate 1 can exchange heat with the sub-cell 31, thereby achieving cooling of the cell 3 by the cold plate 1.

[0032] Furthermore, if Figure 2 As shown, one of the two ends of the installation space 13 along the second direction is open to form an open opening, and the open openings of two adjacent installation spaces 13 are respectively located at the two ends of the second direction, so that the cold plate 1 of the utility model can be manufactured easily.

[0033] It should be noted that, Figure 2 As shown, both ends of a part of the installation space 13 along the first direction are closed, and one end of the other part of the installation space 13 along the first direction is open to form an opening. In a row of sub-cells 31, along the second direction, the sub-cell 31 farthest from the open opening is the first sub-cell 311, and the other sub-cells 31 are the second sub-cells 312. Through the positional relationship between different sub-cells 31 and the cold plate 1, there are three types of heat exchange between the sub-cells 31 and the cold plate 1:

[0034] 1. The three end surfaces of the sub-cell 31 exchange heat with the cold plate 1: Both ends of the installation space 13 along the first direction are closed. At this time, both end surfaces of the first sub-cell 311 along the first direction and one end surface away from the open opening along the second direction can exchange heat with the cold plate 1, thereby increasing the contact area between the cell 3 and the cold plate 1 and improving the heat exchange efficiency.

[0035] 2. The two end surfaces of the sub-cell 31 exchange heat with the cold plate 1: Both ends of the installation space 13 along the first direction are closed. At this time, the two end surfaces of the second sub-cell 312 along the first direction can exchange heat with the cold plate 1, thereby increasing the contact area between the sub-cell 31 and the cold plate 1 and improving the heat exchange efficiency.

[0036] Alternatively, one end of the installation space 13 along the first direction is open, and at this time, the end of the first sub-cell 311 along the first direction away from the opening and the end along the second direction away from the open opening can exchange heat with the cold plate 1, thereby increasing the contact area between the sub-cell 31 and the cold plate 1 and improving the heat exchange efficiency.

[0037] 3. One end surface of the sub-cell 31 exchanges heat with the cold plate 1 : one end of the installation space 13 along the first direction is open, and at this time, one end of the second sub-cell 312 along the first direction away from the opening exchanges heat with the cold plate 1 .

[0038] In summary, through the above-mentioned setting method, when one cold plate 1 is provided, the contact area between the cold plate 1 and the battery cell 3 is greatly increased, thereby improving the heat exchange effect, thereby improving the cooling effect of the cold plate 1 on the battery cell 3. At the same time, since only one cold plate 1 is required to cool the battery cell 3, the structure is simplified and the production cost is reduced.

[0039] Furthermore, the cold plate 1 has a Figure 1 The exhaust channel and the cooling channel are spaced apart in the first direction (c direction in the figure), the exhaust valve is connected to the exhaust channel, and the first direction, the second direction and the third direction are perpendicular to each other. The exhaust channel and the cooling channel extend along the extension direction of the cold plate 1, so that the hot air inside the battery cell 3 can be discharged to the exhaust channel, and the exhaust channel is used to discharge the gas out of the battery pack 10, thereby reducing the risk of thermal runaway and improving the safety of the battery pack 10. At the same time, since the exhaust channel and the cooling channel are spaced in the third direction, when the hot air flows along the extension direction of the cold plate 1, the hot air can continuously exchange heat with the refrigerant in the cooling channel, so that the hot air can be cooled, reducing the probability of thermal runaway of the battery pack 10 and improving the safety of the battery pack 10. In addition, in the third direction, the exhaust channel should be arranged close to the exhaust valve relative to the cooling channel, so as to facilitate the exhaust of the sub-battery cell 31.

[0040] Furthermore, if Figure 1-Figure 3 As shown, the battery cell 3 and the cold plate 1 are both arranged in the shell 2 and connected to the shell 2, so that the battery cell 3 and the cold plate 1 can be fixed in the shell 2, so that the battery cell 3, the cold plate 1 and the shell 2 form a whole, which improves the rigidity and structural strength of the battery pack 10, thereby improving the structural stability. At the same time, the cold plate 1 extends in a winding manner along the first direction, which can replace the longitudinal and transverse beam structure on the shell 2, thereby reducing the material used for the shell 2 and reducing the cost.

[0041] According to the battery pack 10 of the embodiment of the utility model, the battery cell 3 includes multiple rows of sub-battery cells 31 arranged at intervals along the first direction, and the cold plate 1 extends in a winding manner in the first direction to form multiple installation spaces 13 arranged at intervals along the first direction, and the multiple rows of sub-battery cells 31 are arranged in a one-to-one correspondence in the multiple installation spaces 13. Therefore, when one cold plate 1 is provided, the contact area between the cold plate 1 and the battery cell 3 is greatly increased, thereby improving the heat exchange effect, thereby improving the cooling effect of the cold plate 1 on the battery cell 3, and at the same time simplifying the structure and reducing the production cost.

[0042] In some embodiments of the present invention, Figure 2As shown, the cold plate 1 includes a plurality of first plates 11 and a plurality of second plates 12, which are alternately arranged in a first direction and connected end to end to form a peripheral wall of an installation space 13, the first plates 11 extend along the second direction, and the second plates 12 extend along the first direction.

[0043] It is understandable that the first plate 11 extends in the second direction, so that the extension direction of the first plate 11 is consistent with the arrangement direction of the sub-cells 31 in each row of sub-cells 31 , thereby facilitating heat exchange between the first plate 11 and each row of sub-cells 31 .

[0044] Furthermore, if Figure 2 As shown, multiple first plates 11 are arranged at intervals in the first direction, multiple rows of sub-battery cells 31 are arranged at intervals in the first direction, and along the first direction, two adjacent first plates 11 have a row of sub-battery cells 31, so that multiple rows of sub-battery cells 31 and multiple first plates 11 are alternately arranged in the first direction, so that in the first direction, there is a first plate 11 between two adjacent rows of sub-battery cells 31, so that both ends of the first plate 11 along the first direction can simultaneously exchange heat with the two adjacent rows of sub-battery cells 31, thereby increasing the heat exchange area between the first plate 11 and the sub-battery cells 31, thereby improving the cooling effect of the cold plate 1 on the battery cell 3.

[0045] Furthermore, if Figure 2 As shown, the same end of two adjacent first plates 11 along the second direction is respectively connected to the two ends of the second plate 12 along the first direction, so that the second plate 12 can connect the two adjacent first plates 11, so that multiple first plates 11 and multiple second plates 12 can be connected together to form a whole. At the same time, the two adjacent second plates 12 are respectively connected to the two ends of the first plate 11 along the second direction, wherein the second plate 12 and the open mouth are respectively arranged at the two ends of the first plate 11 along the second direction, thereby realizing the winding extension arrangement of the cold plate 1 in the first direction, and thus, through the above-mentioned arrangement of the first plate 11 and the second plate 12, it is convenient to manufacture the cold plate 1 of the present utility model.

[0046] In some embodiments of the present invention, Figure 2 As shown, each sub-cell 31 has an exhaust valve at both ends along the first direction, and the first plate 11 has a first exhaust hole (not shown) at one end or both ends along the first direction, the first exhaust hole is connected to the exhaust valve, and the first exhaust hole is connected to the exhaust channel. An explosion-proof valve 21 is provided on the shell 2, and the exhaust channel is connected to the explosion-proof valve 21.

[0047] It should be noted that when the first board 11 is located between two adjacent sub-cells 31, since both ends of each sub-cell 31 along the first direction have exhaust valves, both ends of the first board 11 along the first direction also have first exhaust holes, and there are multiple first exhaust holes and exhaust valves in a one-to-one correspondence. When a sub-cell 31 is provided at one end of the first board 11 along the first direction, only the end of the first board 11 along the first direction facing the sub-cell 31 has a first exhaust hole, and there are multiple first exhaust holes and exhaust valves in a one-to-one correspondence.

[0048] It can be understood that the first exhaust hole is connected to the exhaust valve, the first exhaust hole is connected to the exhaust channel, the exhaust channel and the cooling channel extend along the extension direction of the cold plate 1, so that the hot air inside the battery cell 3 can be discharged to the exhaust channel, and the exhaust channel can discharge the gas outside the battery pack 10 through the explosion-proof valve 21, thereby reducing the risk of thermal runaway and improving the safety of the battery pack 10. In addition, in the third direction, the exhaust channel is arranged close to the exhaust valve and the first exhaust hole relative to the cooling channel, so as to facilitate the exhaust of the battery cell 3.

[0049] Therefore, when thermal runaway and gas production occur inside the battery cell 3, the hot gas can flow from the exhaust valve to the first exhaust hole, and then to the exhaust channel. The hot gas in the exhaust channel is cooled by the cooling channel and discharged from the battery pack 10 through the explosion-proof valve 21, thereby reducing the risk of thermal runaway and improving the safety of the battery pack 10.

[0050] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the cold plate 1 has a second exhaust hole (not shown) at one end along the extension direction, a third exhaust hole (not shown) is provided on the inner peripheral wall of the shell 2, a connecting channel (not shown) is provided in the peripheral wall of the shell 2, an explosion-proof valve 21 is provided on the outer peripheral wall of the shell 2, the exhaust channel is connected with the second exhaust hole, the second exhaust hole is connected with the third exhaust hole, the third exhaust hole is connected with the connecting channel, and the explosion-proof valve 21 is connected with the connecting channel.

[0051] It can be understood that the second exhaust hole and the third exhaust hole are arranged relative to each other, so as to facilitate the gas to flow from the exhaust channel to the connecting channel, and by setting a connecting channel between the exhaust channel and the explosion-proof valve 21, the gas can be further cooled when flowing in the connecting channel, thereby further reducing the risk of thermal runaway and improving the safety of the battery pack 10.

[0052] Therefore, when thermal runaway and gas production occur inside the battery cell 3, the hot gas can flow from the exhaust valve to the first exhaust hole, and then to the exhaust channel, and cool the hot gas in the exhaust channel through the cooling channel, and flow from the second exhaust hole and the third exhaust hole to the connecting channel, where the gas is further cooled and cooled, and finally discharged from the battery pack 10 from the explosion-proof valve 21, thereby reducing the risk of thermal runaway and improving the safety of the battery pack 10.

[0053] Furthermore, if Figure 1-Figure 3 As shown, the explosion-proof valves 21 are multiple and spaced apart along the second direction, thereby further improving the exhaust efficiency of the battery pack 10, further reducing the risk of thermal runaway, and improving the safety of the battery pack 10. Figure 1-Figure 3 In the example shown, there are two explosion-proof valves 21 , but the present invention is not limited thereto. There may be more explosion-proof valves 21 , such as 3, 4, 5 or 6.

[0054] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the third exhaust hole and the explosion-proof valve 21 are respectively arranged at two ends of the housing 2 along the first direction. Thus, the distance of the gas flowing from the third exhaust hole to the explosion-proof valve 21 is increased, so that the gas can be better cooled in the connecting channel, thereby further reducing the risk of thermal runaway and improving the safety of the battery pack 10.

[0055] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the inner wall of the shell 2 also has a fourth exhaust hole (not shown), and the fourth exhaust hole and the third exhaust hole are arranged at the same end of the shell 2 along the first direction. Along the first direction, the exhaust valve of the sub-cell 31 closest to the fourth exhaust hole facing the fourth exhaust hole is connected to the fourth exhaust hole, and the fourth exhaust hole is connected to the connecting channel.

[0056] Therefore, the sub-cell 31 closest to the fourth exhaust hole can not only be exhausted through the exhaust channel on the cold plate 1, but also be exhausted directly through the fourth exhaust hole, thereby improving the exhaust efficiency, further reducing the risk of thermal runaway, and improving the safety of the battery pack 10.

[0057] In addition, the fourth exhaust hole and the third exhaust hole are arranged at the same end of the shell 2 along the first direction, so that the fourth exhaust hole and the explosion-proof valve 21 can be respectively arranged at the two ends of the shell 2 along the first direction, thereby increasing the distance of the gas flowing from the fourth exhaust hole to the explosion-proof valve 21, so that the gas can be better cooled in the connecting channel, thereby further reducing the risk of thermal runaway and improving the safety of the battery pack 10.

[0058] In some embodiments of the present invention, a sealing strip is provided between the fourth exhaust hole and the exhaust valve, thereby improving the sealing between the fourth exhaust hole and the exhaust valve, thereby reducing gas leakage in the housing 2.

[0059] In some embodiments of the present invention, a sealing strip is provided between the third exhaust hole and the second exhaust hole, thereby improving the sealing between the third exhaust hole and the second exhaust hole, thereby reducing gas leakage in the housing 2.

[0060] In some embodiments of the present invention, a sealing strip is provided between the first exhaust hole and the exhaust valve, thereby improving the sealing performance between the first exhaust hole and the exhaust valve, thereby reducing gas leakage in the housing 2.

[0061] In some embodiments of the present invention, Figure 1-Figure 3 As shown, both ends of the cold plate 1 along the extension direction are connected to the inner wall of the shell 2, and the end of the battery cell 3 along the third direction close to the shell 2 is connected to the shell 2, and the first direction, the second direction and the third direction are perpendicular to each other. As a result, the connection reliability between the cold plate 1 and the shell 2 is further improved, and the connection reliability between the battery cell 3 and the shell 2 is also improved, thereby further improving the overall strength and rigidity of the battery pack 10.

[0062] In some embodiments of the present invention, Figure 3 As shown, one side of the battery cell 3 along the second direction is spaced apart from the inner peripheral wall of the shell 2 to form a receiving groove 22, and the receiving groove 22 is used to install the circuit and the water pipe. In this way, the installation interference between the circuit and the water pipe and the battery cell 3 can be avoided. The circuit is used to connect with the battery cell 3, so as to realize the power function of the battery pack 10, and the water pipe is used to connect with the cold plate 1, so that the refrigerant in the cold plate 1 can flow, and the cooling effect of the cold plate 1 on the battery cell 3 is realized.

[0063] In addition, the battery pack 10 of the present invention adopts an integrated CCS (Cells Contact System, integrated busbar) design in which the busbar replaces the PACK copper busbar, thereby improving the volume grouping efficiency of the battery pack 10 and reducing the cost.

[0064] In some embodiments of the present invention, the shell 2 and the cold plate 1 are connected by fasteners such as bolts and nuts or by bonding, thereby improving the connection reliability between the shell 2 and the cold plate 1, thereby further improving the overall strength and rigidity of the battery pack 10.

[0065] In some embodiments of the present invention, the cold plate 1 and the battery cells 3 are connected by bonding, thereby improving the connection reliability between the cold plate 1 and the battery cells 3 , thereby further improving the overall strength and rigidity of the battery pack 10 .

[0066] In some embodiments of the present invention, the battery cell 3 is connected to the housing 2 by bonding, thereby improving the connection reliability between the cold plate 1 and the battery cell 3 , thereby further improving the overall strength and rigidity of the battery pack 10 .

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A battery cell, wherein the battery cell comprises a plurality of rows of sub-battery cells arranged at intervals along a first direction, each row of the sub-battery cells comprises a plurality of the sub-battery cells arranged and connected along a second direction, and the sub-battery cells have exhaust valves; A cold plate, wherein the cold plate extends in a winding manner in the first direction to form a plurality of installation spaces spaced apart along the first direction, a plurality of rows of sub-cells are arranged in the plurality of installation spaces in a one-to-one correspondence, one end of the two ends of the installation space along the second direction is open to form an open opening, the open openings of two adjacent installation spaces are respectively located at the two ends of the second direction, the cold plate has an exhaust channel and a cooling channel spaced apart along a third direction, the exhaust valve is connected to the exhaust channel, and the first direction, the second direction and the third direction are perpendicular to each other; The battery cell and the cold plate are both arranged in the shell and connected to the shell.

2. The battery pack according to claim 1, characterized in that: The cold plate includes a plurality of first plates and a plurality of second plates, wherein the plurality of first plates and the plurality of second plates are alternately arranged in the first direction and connected end to end to form a peripheral wall of the installation space, wherein the first plates extend along the second direction, and the second plates extend along the first direction, and the same ends of two adjacent first plates along the second direction are respectively connected to two ends of the second plate along the first direction, and two adjacent second plates are respectively connected to two ends of the first plate along the second direction.

3. The battery pack according to claim 2, characterized in that: Each of the sub-cells has the exhaust valve at both ends along the first direction, the first plate has a first exhaust hole at one end or both ends along the first direction, the first exhaust hole is connected to the exhaust valve and the exhaust channel, the shell has an explosion-proof valve, and the exhaust channel is connected to the explosion-proof valve.

4. The battery pack according to claim 3, characterized in that: The cold plate has a second exhaust hole at one end along the extension direction, a third exhaust hole is provided on the inner peripheral wall of the shell, a connecting channel is provided in the peripheral wall of the shell, the explosion-proof valve is arranged on the outer peripheral wall of the shell, the exhaust channel is communicated with the second exhaust hole, the second exhaust hole is communicated with the third exhaust hole, the third exhaust hole is communicated with the connecting channel, and the explosion-proof valve is communicated with the connecting channel.

5. The battery pack according to claim 4, characterized in that: The third exhaust hole and the explosion-proof valve are respectively arranged at two ends of the housing along the first direction.

6. The battery pack according to claim 5, characterized in that: The shell also has a fourth exhaust hole on the inner wall, and the fourth exhaust hole and the third exhaust hole are arranged at the same end of the shell along the first direction. Along the first direction, the exhaust valve on the side of the sub-cell closest to the fourth exhaust hole facing the fourth exhaust hole is connected to the fourth exhaust hole, and the fourth exhaust hole is connected to the connecting channel.

7. The battery pack according to claim 6, characterized in that: A sealing strip is provided between the fourth exhaust hole and the exhaust valve; And / or, a sealing strip is provided between the third exhaust hole and the second exhaust hole; And / or, a sealing strip is provided between the first exhaust hole and the exhaust valve.

8. The battery pack according to claim 1, characterized in that: Both ends of the cold plate along the extension direction are connected to the inner peripheral wall of the shell, and one end of the battery cell close to the shell along the third direction is connected to the shell.

9. The battery pack according to claim 1, characterized in that: One side of the battery cell along the second direction is spaced apart from the inner peripheral wall of the shell to form a receiving groove, and the receiving groove is used to install a circuit and a water pipe.

10. The battery pack according to claim 1, characterized in that: The shell and the cold plate are connected by fasteners or adhesively; And / or, the cold plate and the battery core are connected by bonding; And / or, the battery core is connected to the shell by bonding.

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