Battery

Abstract

The utility model discloses a battery, and relates to the technical field of batteries. The battery comprises a battery cell group; and the liquid cooling plate is used for carrying out liquid cooling on the battery cell group so as to improve the heat dissipation efficiency of the battery cells and prolong the cycle life of the battery cells. The liquid cooling part comprises a liquid inlet channel, a liquid outlet channel and a liquid cooling channel, the liquid cooling channel is provided with a first port and a second port, the first port is communicated with the liquid inlet channel, the second port is communicated with the liquid outlet channel, and the liquid inlet channel and the liquid outlet channel are located on the same side of the liquid cooling channel. Therefore, the temperature of the cooling liquid located in the liquid inlet channel is low, the temperature of the cooling liquid located in the liquid outlet channel is high, and the flow channels of the liquid cooling plate are designed to be in a high-temperature and low-temperature adjacent and staggered distribution mode, so that the temperature distribution of the whole liquid cooling plate is more uniform.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery. Background Art

[0002] Hybrid vehicles and pure electric vehicles, as representatives of new energy vehicles, have gradually gained recognition from manufacturers and consumers. As the main power source of new energy vehicles, power batteries have become one of the key components of electric vehicles.

[0003] At present, when batteries are assembled, they are assembled by assembling multiple blade batteries and installing them in a box. The batteries will generate heat when working for a long time, especially the blade battery's tabs are prone to heat up. Traditional heat dissipation components cannot dissipate heat well, which can easily reduce the battery life over time and cause bulging and damage. Utility Model Content

[0004] The purpose of the utility model is to provide a battery cell and a battery, so as to solve the technical problem that the heat dissipation effect of the battery is poor due to the traditional heat dissipation method.

[0005] To achieve the above-mentioned objectives, the present invention provides a battery, comprising: a battery cell group; and a liquid cooling plate, the liquid cooling plate being used to liquid-cool the battery cell group; wherein the liquid cooling component comprises a liquid inlet channel, a liquid outlet channel and a liquid cooling channel, the liquid cooling channel having a first port and a second port, the first port being connected to the liquid inlet channel, the second port being connected to the liquid outlet channel, and the liquid inlet channel and the liquid outlet channel being located on the same side of the liquid cooling channel.

[0006] In some embodiments, the liquid inlet channel, the liquid outlet channel, and the liquid cooling channel are arranged at intervals along the width direction of the battery.

[0007] In some embodiments, the liquid cooling channel includes a first liquid cooling section and a second liquid cooling section that are interconnected, and the liquid inlet channel, the liquid outlet channel, the first liquid cooling section and the second liquid cooling section are sequentially spaced apart in the width direction of the battery.

[0008] In some embodiments, the battery further includes: a first connecting tube, a second connecting tube, and a third connecting tube, the first connecting tube being connected between the liquid inlet channel and the second liquid cooling section, the second connecting tube being connected between the second liquid cooling section and the first liquid cooling section, and the third connecting tube being connected between the first liquid cooling section and the liquid outlet channel.

[0009] In some embodiments, the liquid cooling channel includes a first liquid cooling segment, a second liquid cooling segment, a third liquid cooling segment, a fourth liquid cooling segment, a fifth liquid cooling segment, and a sixth liquid cooling segment that are interconnected, and the liquid inlet channel, the liquid outlet channel, the first liquid cooling segment, the second liquid cooling segment, the third liquid cooling segment, the fourth liquid cooling segment, the fifth liquid cooling segment, and the sixth liquid cooling segment are arranged in sequence in the width direction of the battery.

[0010] In some embodiments, the battery further includes: a first connecting tube, a second connecting tube, a third connecting tube, a fourth connecting tube, a fifth connecting tube, a sixth connecting tube and a seventh connecting tube, the first connecting tube being connected between the liquid inlet channel and the second liquid cooling section, the second connecting tube being connected between the second liquid cooling section and the third liquid cooling section, the third connecting tube being connected between the third liquid cooling section and the sixth liquid cooling section, the fourth connecting tube being connected between the sixth liquid cooling section and the fifth liquid cooling section, the fifth connecting tube being connected between the fifth liquid cooling section and the fourth liquid cooling section, the sixth connecting tube being connected between the fourth liquid cooling section and the second liquid cooling section, and the seventh connecting tube being connected between the first liquid cooling section and the liquid outlet channel.

[0011] In some embodiments, the liquid cooling plate is provided with a liquid inlet and a liquid outlet on a surface on a side away from the battery cell group. The liquid inlet is connected to the liquid inlet channel, and the liquid outlet is connected to the liquid outlet channel. The liquid inlet and the liquid outlet are arranged adjacent to each other.

[0012] In some embodiments, the battery cell group includes a plurality of battery cells, each battery cell has a pole, the pole is located on a side of the battery cell group, and the liquid cooling plate is arranged on the top surface and / or bottom surface of the battery cell group.

[0013] In some embodiments, there are multiple battery cell groups, and the multiple battery cell groups are arranged in the height direction of the battery, and a liquid cooling plate is provided for any two adjacent battery cell groups.

[0014] In some embodiments, the liquid cooling plate has a first liquid cooling surface and a second liquid cooling surface arranged opposite to each other, the first liquid cooling surface contacts the bottom surface of the battery cell group, and the second liquid cooling surface contacts the top surface of the battery cell group, and both the first liquid cooling surface and the second liquid cooling surface are flat.

[0015] In some embodiments, the battery further includes: a thermally conductive gasket disposed between the battery cell group and the liquid cooling element.

[0016] In some embodiments, the liquid cooling element is an integrally formed structure and is arranged in an S-shape.

[0017] The technical effect of the present invention is to provide a battery, in which a liquid cooling plate is arranged on the battery cell group to liquid-cool the battery cell group, so as to improve the heat dissipation efficiency and cycle life of the battery cell. The liquid cooling plate includes a liquid inlet channel, a liquid outlet channel and a liquid cooling channel. The liquid cooling channel has a first port and a second port. The first port is connected to the liquid inlet channel, and the second port is connected to the liquid outlet channel. The liquid inlet channel and the liquid outlet channel are located on the same side of the liquid cooling channel. Therefore, the temperature of the coolant located in the liquid inlet channel of the present application is lower, and the temperature of the coolant located in the liquid outlet channel is higher. The flow channel of the liquid cooling plate is designed in a form in which high and low temperatures are adjacent and staggered, so that the temperature distribution of the entire liquid cooling plate is more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0019] Figure 1 Schematic diagram of the split structure of the battery provided in an embodiment of the present application.

[0020] Figure 2 This is a schematic diagram of the top surface structure of the battery provided in an embodiment of the present application, which mainly reflects the structure in which the first liquid cooling plate is arranged on the top surface of the battery cell group.

[0021] Figure 3 This is a schematic diagram of the bottom structure of the battery provided in an embodiment of the present application, which mainly reflects the structure in which the first liquid cooling plate is arranged on the bottom surface of the battery cell group.

[0022] Figure 4 A schematic structural diagram of the first liquid cooling plate provided in an embodiment of the present application having two liquid cooling units.

[0023] Figure 5 A schematic structural diagram of the second liquid cooling plate provided in an embodiment of the present application having two liquid cooling units.

[0024] The components of the accompanying drawings are identified as follows:

[0025] 100 batteries;

[0026] 1 battery cell group; 10 battery cells; 11 poles; 11a first pole; 11b second pole;

[0027] 2 liquid cooling plates; 2a first liquid cooling plate; 2b second liquid cooling plate;

[0028] 21 liquid inlet channel; 21a first liquid inlet channel; 21b second liquid inlet channel;

[0029] 22 liquid outlet channel; 22a first liquid outlet channel; 22b second liquid outlet channel;

[0030] 23 liquid cooling channel; 23a first liquid cooling channel; 23b second liquid cooling channel;

[0031] 231a / 231b first port; 232a / 232b second port;

[0032] 2031a / 2031b first liquid cooling section; 2032a / 2032b second liquid cooling section; 2033a / 2033b third liquid cooling section; 2034a / 2034b fourth liquid cooling section; 2035a / 2035b fifth liquid cooling section; 2036a / 2036b sixth liquid cooling section;

[0033] 24a first liquid inlet; 24b second liquid inlet;

[0034] 25a second liquid outlet; 25b second liquid outlet;

[0035] 26a / 26b first connecting pipe; 27a / 27b second connecting pipe; 28a / 28b third connecting pipe; 29a / 29b fourth connecting pipe; 30a / 30b fifth connecting pipe; 31a / 31b sixth connecting pipe; 32a / 32b seventh connecting pipe;

[0036] 201a / 201b first liquid cooling surface; 202a / 202b second liquid cooling surface;

[0037] 3 partitions;

[0038] 221a / 221b first liquid cooling unit; 222a / 222b second liquid cooling unit;

[0039] 4 first thermal pad; 5 second thermal pad;

[0040] X is the first direction; Y is the second direction; Z is the third direction. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0042] In this application, the term "parallel" includes not only absolute parallelism but also the generally recognized parallelism in engineering practice, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°. At the same time, "perpendicular" also includes not only absolute perpendicularity but also the generally recognized perpendicularity in engineering practice, such as "perpendicular" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only absolute equality but also the generally recognized equality in engineering practice, which may include a certain error, such as a tolerance range of -1% to 1%.

[0043] In this application, unless otherwise specified or limited, terms such as "connected," "connected," and "stacked" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0044] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0045] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0046] Batteries tend to heat up when working for a long time. Traditional heat dissipation methods cannot dissipate heat well, and the heat dissipation effect is poor and the temperature difference between battery cells is large. In order to solve the above problems, the present application provides a battery, including a battery cell group and a liquid cooling plate, the liquid cooling plate is used to liquid-cool the battery cell group to improve the heat dissipation efficiency and cycle life of the battery cell, and reduce the risk of bulging. Among them, the liquid cooling part includes a liquid inlet channel, a liquid outlet channel and a liquid cooling channel, the liquid cooling channel has a first port and a second port, the first port is connected to the liquid inlet channel, the second port is connected to the liquid outlet channel, and the liquid inlet channel and the liquid outlet channel are located on the same side of the liquid cooling channel. Therefore, the temperature of the coolant located in the liquid inlet channel is lower, and the temperature of the coolant located in the liquid outlet channel is higher. The flow channel is designed in a form where high and low temperatures are adjacent and staggered, so that the temperature distribution of the entire liquid cooling plate is more uniform. A detailed description will be expanded below.

[0047] Please also refer to Figures 1 to 3, an embodiment of the present application provides a battery 100, including a battery cell group 1 and a liquid cooling plate 2. The liquid cooling plate 2 can be disposed on the top surface or the bottom surface of the battery cell group 1, or disposed on both the top surface and the bottom surface simultaneously, for liquid cooling of the battery cell group 1 to improve the heat dissipation efficiency of the battery cells 10 and avoid the situation of excessive temperature difference of the battery cells 10.

[0048] The liquid cooling member 2 includes an inlet channel 21, an outlet channel 22 and a liquid cooling channel 23. The liquid cooling channel 21 has a first port 231a / 231b and a second port 232a / 232b. The first port 231a / 231b is communicated with the inlet channel 21, and the second port 232a / 232b is communicated with the outlet channel 22. The inlet channel 21 and the outlet channel 22 are located on the same side of the liquid cooling channel 23.

[0049] On the surface of the liquid cooling plate 2 away from the battery cell group 1, an inlet port 24a / 24b and an outlet port 25a / 25b are provided. The inlet port 24a / 24b is communicated with the inlet channel 21, and the outlet port 25a / 25b is communicated with the outlet channel 22. The inlet port 24a / 24b and the outlet port 25a / 25b are adjacent to each other. In this way, the temperature of the coolant near the inlet port 24a / 24b of the liquid cooling plate 2 is lower, and the temperature of the coolant near the outlet port 25a / 25b is higher. Moreover, the flow channels of the cooling plate 2 are in a form of high and low temperatures approaching and交错分布 (staggered distribution), making the temperature distribution of the entire liquid cooling plate 2 more uniform.

[0050] The cross-sectional structure of the inlet port 24a / 24b in the third direction Z can be in the shape of a "mouth". Similarly, the cross-sectional structure of the outlet port 25a / 25b in the third direction Z can be in the shape of a "mouth". Among them, the inlet port 24a / 24b and the inlet channel 21 can be fixed by welding, and the outlet port 25a / 25b and the outlet channel 22 can be fixed by welding. Of course, other fixing forms can also be used. For example, the inlet port 24a / 24b and the inlet channel 21, and the outlet port 25a / 25b and the outlet channel 22 are respectively fixed by threading, and seals are respectively provided between the inlet port 24a / 24b and the inlet channel 21, and between the outlet port 25a / 25b and the outlet channel 22 to achieve the sealing effect.

[0051] The inlet channel 21, the outlet channel 22 and the liquid cooling channel 23 are arranged at intervals along the width direction of the battery 100. The liquid cooling channel 21 includes at least two interconnected liquid cooling segments, including a first liquid cooling segment 2031a / 2031b and a second liquid cooling segment 2032a / 2032b. Then, the inlet channel 21, the outlet channel 22, the first liquid cooling segment 2031a / 2031b and the second liquid cooling segment 2032a / 2032b are arranged at intervals in sequence in the second direction Y.

[0052] The battery 100 further includes a first connecting tube 26a / 26b, a second connecting tube 27a / 27b, and a third connecting tube 28a / 28b. The first connecting tube 26a / 26b connects between the liquid inlet channel 21 and the second liquid-cooling section 2032a / 2032b, the second connecting tube 27a / 27b connects between the second liquid-cooling section 2032a / 2032b and the first liquid-cooling section 2031a / 2031b, and the third connecting tube 28a / 28b connects between the first liquid-cooling section 2031a / 2031b and the liquid outlet channel 23. It will be appreciated that the coolant flows from the liquid inlet 24a / 24b into the liquid inlet channel 21, then flows from the liquid inlet channel 21 sequentially to the second liquid-cooling section 2032a / 2032b, the first liquid-cooling section 2031a / 2031b, and the liquid outlet channel 23, before finally flowing out from the liquid outlet 25a / 25b. The liquid cooling plate 2 may be in the form of a coil structure, and the flow channels of the liquid cooling plate 2 are arranged in a staggered manner with high and low temperatures close to each other, so that the temperature distribution of the entire liquid cooling plate 2 is more uniform, thereby improving the heat dissipation effect of the battery 100.

[0053] Optionally, the liquid cooling plate 2 is an integrally formed structure arranged in an S-shape. The liquid cooling plate 2 is manufactured using an extrusion process, with the flow path of the liquid cooling plate 2 perpendicular to the width of the battery 100. This ensures that the contact area between each battery cell 10 and the liquid cooling plate 2 is substantially uniform, thereby facilitating control of the temperature difference between each battery cell 10.

[0054] The liquid cooling plate 2 has a first liquid cooling surface 201a / 201b and a second liquid cooling surface 202a / 202b arranged opposite each other in the third direction Z. The first liquid cooling surface 201a / 201b can contact the bottom surface of the battery cell group 1, and the second liquid cooling surface 202a / 202b can contact the top surface of the battery cell group 1. The first liquid cooling surface 201a / 201b and the second liquid cooling surface 202a / 202b are both flat. It is understood that the liquid cooling plate 2 can be formed by bending a flat tube to form a coil structure.

[0055] There are multiple cell groups 1, arranged in the height direction of the battery 100. A liquid cooling plate 2 is provided between any two adjacent cell groups 1 to cool both cell groups 1 simultaneously. It is understood that the multiple cell groups 1 are arranged from bottom to top in the following manner: first cell group, second cell group, third cell group, fourth cell group, and so on, the nth cell group. A liquid cooling plate 2 is provided between any two adjacent cell groups 1 to cool both cell groups 1 simultaneously.

[0056] The context mentions "length direction" as Figure 1 The first direction X in the “width direction” is Figure 1 The second direction Y in the “height direction” is Figure 1 The third direction Z in .

[0057] Combine Figure 1 As shown, the battery 100 includes a cell group 1 and two liquid cooling plates, and the cell group 1 is arranged between the two liquid cooling plates in the height direction.

[0058] The battery cell group 1 includes a plurality of battery cells 10 arranged along a first direction X, each battery cell having a pole 11, and the pole is located on the side of the battery cell group 1. Specifically, Figures 2 to 3 As shown, the pole 11 includes a first pole 11a and a second pole 11b. The first pole 11a is located on a first side surface of the battery cell group 1 in the second direction Y, and the second pole 11b is located on a second side surface of the battery cell group 1 in the second direction Y. Of course, the first pole 11a and the second pole 11b can also be located on both the first side surface or the second side surface.

[0059] The first electrode 11a may be a positive electrode, and the second electrode 11b may be a negative electrode. Conversely, the first electrode 11a may be a negative electrode, and the second electrode 11b may be a positive electrode.

[0060] The battery pack 1 can include multiple battery cells, with adjacent battery cells separated by a partition 3. The partition 3 is positioned within the battery housing 100 (not shown) to divide the housing into multiple compartments, with each battery cell positioned within a corresponding compartment. The partition 3 cooperates with the housing to limit battery cell expansion. The partition 3 can be an extruded hollow structure or a flexible foam material, without particular limitation.

[0061] The two liquid cooling plates are respectively a first liquid cooling plate 2a and a second liquid cooling plate 2b.

[0062] Combine Figure 1 and Figure 2 As shown, the first liquid cooling plate 2a includes a first liquid inlet channel 21a, a first liquid outlet channel 22a, and a first liquid cooling channel 23a. The first liquid cooling channel 21a has a first port 231a and a second port 232a. The first port 231a is connected to the first liquid inlet channel 21a, and the second port 232a is connected to the first liquid outlet channel 22a. The first liquid inlet channel 21a and the first liquid outlet channel 22a are located on the same side of the first liquid cooling channel 23a.

[0063] The first liquid cooling plate 2a is arranged on the upper surface of the battery cell group 1, and is provided with a first liquid inlet 24a and a first liquid outlet 25a on the upper surface. The first liquid inlet 24a is communicated with the first liquid inlet channel 21a, and the first liquid outlet 25a is communicated with the first liquid outlet channel 22a. The first liquid inlet 24a and the first liquid outlet 25a are arranged adjacent to each other. In this way, the temperature of the coolant near the first liquid inlet 24a of the first liquid cooling plate 2a is lower, and the temperature of the coolant near the first liquid outlet 25a is higher. In addition, the flow channel of the first cooling plate 2a is in the form of high and low temperature close to each other and staggered distribution, so that the temperature distribution of the entire first liquid cooling plate 2a is more uniform.

[0064] The first liquid cooling channel 23a includes a first liquid cooling section 2031a and a second liquid cooling section 2032a. In the first liquid cooling plate 2a, the first liquid inlet channel 21a, the first liquid outlet channel 22a, the first liquid cooling section 2031a and the second liquid cooling section 2032a are sequentially arranged in the second direction Y.

[0065] In the embodiment of the present application, the first connecting pipe 26a is connected between the first liquid inlet channel 22a and the second liquid cooling section 2032a, the second connecting pipe 27a is connected between the second liquid cooling section 2032a and the first liquid cooling section 2031a, and the third connecting pipe 28a is connected between the first liquid cooling section 2031a and the first liquid outlet channel 22a, so that the coolant flows from the first liquid inlet channel 21a to the second liquid cooling section 2032a, the first liquid cooling section 2031a and the first liquid outlet channel 22a in sequence to realize the circulation of the coolant, and the flow channel of the first liquid cooling plate 2a is in the form of high and low temperature close and staggered distribution, so that the temperature distribution of the entire first liquid cooling plate 2a is more uniform, thereby improving the heat dissipation effect of the battery 100.

[0066] The flow channel direction of the first liquid cooling plate 2 a is perpendicular to the width direction of the battery 100 , so that the contact area between each battery cell 10 and the first liquid cooling plate 2 a is substantially the same, thereby facilitating control of the temperature difference between each battery cell 10 .

[0067] The first liquid cooling plate 2a has a first liquid cooling surface 201a and a second liquid cooling surface 202a disposed opposite each other in the third direction Z. The first liquid cooling surface 201a can contact the bottom surface of the battery cell group 1, and the second liquid cooling surface 2021a can contact the top surface of the battery cell group 1. Both the first liquid cooling surface 201a and the second liquid cooling surface 202a are flat. It is understood that the first liquid cooling plate 2a can be a coil structure formed by bending a flat tube.

[0068] Combine Figure 1 and Figure 3As shown, the second liquid cooling plate 2b includes a second liquid inlet channel 21b, a second liquid outlet channel 22b and a second liquid cooling channel 23b. The second liquid cooling channel 21b has a first port 231b and a second port 232b. The first port 231b is connected to the second liquid inlet channel 21b, and the second port 232b is connected to the second liquid outlet channel 22b. The second liquid inlet channel 21b and the second liquid outlet channel 22b are located on the same side of the second liquid cooling channel 23b.

[0069] The second liquid cooling plate 2b is arranged on the lower surface of the battery cell group 1, and is provided with a second liquid inlet 24b and a second liquid outlet 25b on the lower surface. The second liquid inlet 24b is communicated with the second liquid inlet channel 21b, and the second liquid outlet 25b is communicated with the second liquid outlet channel 22b. The second liquid inlet 24b and the second liquid outlet 25b are arranged adjacent to each other. In this way, the temperature of the coolant near the second liquid inlet 24b of the second liquid cooling plate 2b is lower, and the temperature of the coolant near the second liquid outlet 25b is higher. In addition, the flow channel of the second cooling plate 2b is in the form of high and low temperature close to each other and staggered distribution, so that the temperature distribution of the entire second liquid cooling plate 2b is more uniform.

[0070] The second liquid cooling channel 23b includes a first liquid cooling section 2031b and a second liquid cooling section 2032b. In the second liquid cooling plate 2b, the second liquid inlet channel 21b, the second liquid outlet channel 22b, the first liquid cooling section 2031b and the second liquid cooling section 2032b are sequentially arranged in the second direction Y.

[0071] In the embodiment of the present application, the first connecting pipe 26b is connected between the second liquid inlet channel 22b and the second liquid cooling section 2032b, the second connecting pipe 27b is connected between the second liquid cooling section 2032b and the first liquid cooling section 2031b, and the third connecting pipe 28b is connected between the first liquid cooling section 2031b and the second liquid outlet channel 22b, so that the coolant flows from the second liquid inlet channel 21b to the second liquid cooling section 2032b, the first liquid cooling section 2031b and the second liquid outlet channel 22b in sequence to realize the circulation of the coolant, and the flow channel of the second liquid cooling plate 2b is in the form of high and low temperature close and staggered distribution, so that the temperature distribution of the entire second liquid cooling plate 2b is more uniform, thereby improving the heat dissipation effect of the battery 100.

[0072] The flow channel direction of the second liquid cooling plate 2 b is perpendicular to the width direction of the battery 100 , so that the contact area between each battery cell 10 and the second liquid cooling plate 2 b is substantially the same, thereby facilitating control of the temperature difference between each battery cell 10 .

[0073] The second liquid-cooling plate 2b has a first liquid-cooling surface 201b and a second liquid-cooling surface 202b disposed opposite each other in the third direction Z. The first liquid-cooling surface 201b can contact the bottom surface of the battery cell group 1, and the second liquid-cooling surface 2021b can contact the bottom surface of the battery cell group 1. Both the first liquid-cooling surface 201b and the second liquid-cooling surface 202b are flat. It is understood that the second liquid-cooling plate 2b can be a coil structure formed by bending a flat tube.

[0074] Therefore, in the embodiment of the present application, a first liquid cooling plate 2a and a second liquid cooling plate 2b are respectively provided on the top and bottom surfaces of the battery cell group 1 to cool the top and bottom surfaces of the battery cell group 1, thereby improving the heat dissipation effect of the battery cell group 1. Optionally, the orthographic projections of the first liquid inlet 24a of the first liquid cooling plate 2a and the first liquid inlet 24b of the second liquid cooling plate 2b on the same plane overlap with each other, and the orthographic projections of the first liquid outlet 25a of the first liquid cooling plate 2a and the first liquid outlet 25b of the second liquid cooling plate 2b on the same plane overlap with each other. In this way, when external pipelines are connected to the first liquid cooling plate 2a and the second liquid cooling plate 2b, the number of pipeline connections and the number of connection points can be reduced, thereby improving the space utilization of the battery 100.

[0075] Combine Figure 2 and Figure 3 As shown, the battery 100 further includes a first thermally conductive gasket 4 and a second thermally conductive gasket 5. The first thermally conductive gasket 4 is disposed between the top surface of the battery cell group 2 and the first liquid cooling plate 2a. This allows the heat generated by the battery cells 10 to be quickly transferred to the first liquid cooling plate 2a, thereby cooling the upper surface of the battery cell group 1. The second thermally conductive gasket 5 is disposed between the bottom surface of the battery cell group 1 and the second liquid cooling plate 2b. This allows the heat generated by the battery cells 10 to be quickly transferred to the second liquid cooling plate 2b, thereby cooling the lower surface of the battery cell group 1.

[0076] like Figure 4 and Figure 5 As shown, the liquid-cooling channel 23 includes a first liquid-cooling section 2031a / 2031b, a second liquid-cooling section 2032a / 2032b, a third liquid-cooling section 2033a / 2033b, a fourth liquid-cooling section 2034a / 2034b, a fifth liquid-cooling section 2035a / 2035b, and a sixth liquid-cooling section 2036a / 2036b, which are interconnected. The liquid inlet channel 21, the liquid outlet channel 22, the first liquid-cooling section 2031a / 2031b, the second liquid-cooling section 2032a / 2032b, the third liquid-cooling section 2033a / 2033b, the fourth liquid-cooling section 2034a / 2034b, the fifth liquid-cooling section 2035a / 2035b, and the sixth liquid-cooling section 2036a / 2036b are arranged in sequence in the width direction of the battery 100.

[0077] The battery 100 further includes a first connecting tube 26a / 26b, a second connecting tube 27a / 27b, a third connecting tube 28a / 28b, a fourth connecting tube 29a / 29, a fifth connecting tube 30a / 30b, a sixth connecting tube 31a / 31, and a seventh connecting tube 32a / 32b. The first connecting tube 26a / 26b is connected between the liquid inlet channel 21 and the second liquid cooling section 2032a / 2032b, the second connecting tube 27a / 27b is connected between the second liquid cooling section 2032a / 2032b and the third liquid cooling section 2033a / 2033b, the third connecting tube 28a / 28b is connected between the third liquid cooling section 2033a / 2033b and the sixth liquid cooling section 2036a / 2036b, and the fourth connecting tube 29a / 29b is connected to the sixth liquid cooling section 2036a. / 2036b is connected to the fifth liquid cooling section 2035a / 2035b, the fifth connecting pipe 30a / 30b is connected between the fifth liquid cooling section 2035a / 2035b and the fourth liquid cooling section 2034a / 2034b, the sixth connecting pipe 31a / 31b is connected between the fourth liquid cooling section 2034a / 2034b and the first liquid cooling section 2031a / 2031b, and the seventh connecting pipe 32a / 32b is connected between the first liquid cooling section 2031a / 2031b and the liquid outlet channel 22.

[0078] like Figure 4 As shown, in one embodiment, the first liquid cooling plate 2a includes a first liquid inlet channel 21a, a first liquid outlet channel 22a, and a first liquid cooling channel 23a. The first liquid cooling channel 23a includes a first liquid cooling section 2031a, a second liquid cooling section 2032a, a third liquid cooling section 2033a, a fourth liquid cooling section 2034a, a fifth liquid cooling section 2035a, and a sixth liquid cooling section 2036a that are interconnected. The first liquid inlet channel 21a, the first liquid outlet channel 22a, the first liquid cooling section 2031a, the second liquid cooling section 2032a, the third liquid cooling section 2033a, the fourth liquid cooling section 2034a, the fifth liquid cooling section 2035a, and the sixth liquid cooling section 2036a are sequentially spaced apart in the width direction of the battery 100.

[0079] It is understandable that Figure 4The diagram illustrates a structure in which the first liquid cooling plate 2a is divided into two liquid cooling units along the KK direction, namely the first liquid cooling unit 221a and the second liquid cooling unit 222a. The third liquid cooling section 2033a serves as the liquid inlet channel of the second liquid cooling unit 222a, the fourth liquid cooling section 2034a serves as the liquid outlet channel of the second liquid cooling unit 222a, and the fifth liquid cooling section 2035a and the sixth liquid cooling section 2036a serve as the liquid cooling channels of the second liquid cooling unit 222a. It should be noted that in other embodiments, the first liquid cooling plate 2a may include multiple liquid cooling units. This is sufficient as long as the design of the first liquid cooling plate 2a is such that the high and low temperatures are close together and staggered, which facilitates a more uniform temperature distribution across the entire first liquid cooling plate 2a.

[0080] The first connecting pipe 26a is connected between the first liquid inlet channel 21a and the second liquid-cooling section 2032a, the second connecting pipe 27a is connected between the second liquid-cooling section 2032a and the third liquid-cooling section 2033a, the third connecting pipe 28a is connected between the third liquid-cooling section 2033a and the sixth liquid-cooling section 2036a, the fourth connecting pipe 29a is connected between the sixth liquid-cooling section 2036a and the fifth liquid-cooling section 2035a, the fifth connecting pipe 30a is connected between the fifth liquid-cooling section 2035a and the fourth liquid-cooling section 2034a, the sixth connecting pipe 31a is connected between the fourth liquid-cooling section 2034a and the first liquid-cooling section 2031a, and the seventh connecting pipe 32a is connected between the first liquid-cooling section 2031a and the second liquid outlet channel 22b.

[0081] The first liquid cooling plate 2 a has a plurality of cooling channels to increase the contact area between the battery cell and the first liquid cooling plate 2 a , thereby further dissipating heat from the battery cell 10 .

[0082] like Figure 5 As shown, in one embodiment, the second liquid cooling plate 2b includes a second liquid inlet channel 21b, a second liquid outlet channel 22b, and a second liquid cooling channel 23b. The second liquid cooling channel 23b includes a first liquid cooling segment 2031b, a second liquid cooling segment 2032b, a third liquid cooling segment 2033b, a fourth liquid cooling segment 2034b, a fifth liquid cooling segment 2035b, and a sixth liquid cooling segment 2036b, which are interconnected. The second liquid inlet channel 21b, the second liquid outlet channel 22b, the first liquid cooling segment 2031b, the second liquid cooling segment 2032b, the third liquid cooling segment 2033b, the fourth liquid cooling segment 2034b, the fifth liquid cooling segment 2035b, and the sixth liquid cooling segment 2036b are sequentially spaced apart in the width direction of the battery 100.

[0083] It is understandable that Figure 5The diagram shows that the second liquid cooling plate 2b is divided into two liquid cooling units along the PP direction, namely the first liquid cooling unit 221b and the second liquid cooling unit 222b. The third liquid cooling section 2033b serves as the liquid inlet channel of the second liquid cooling unit 222b, the fourth liquid cooling section 2034b serves as the liquid outlet channel of the second liquid cooling unit 222b, and the fifth liquid cooling section 2035b and the sixth liquid cooling section 2036b serve as the liquid cooling channels of the second liquid cooling unit 222b. It should be noted that in other embodiments, the second liquid cooling plate 2b may include multiple liquid cooling units. This is sufficient as long as the design of the second liquid cooling plate 2b is such that the high and low temperatures are close together and staggered, which promotes a more uniform temperature distribution across the entire second liquid cooling plate 2b.

[0084] The first connecting pipe 26b is connected between the second liquid inlet channel 21b and the second liquid-cooling section 2032b, the second connecting pipe 27b is connected between the second liquid-cooling section 2032b and the third liquid-cooling section 2033b, the third connecting pipe 28b is connected between the third liquid-cooling section 2033b and the sixth liquid-cooling section 2036b, the fourth connecting pipe 29b is connected between the sixth liquid-cooling section 2036b and the fifth liquid-cooling section 2035b, the fifth connecting pipe 30b is connected between the fifth liquid-cooling section 2035b and the fourth liquid-cooling section 2034b, the sixth connecting pipe 31b is connected between the fourth liquid-cooling section 2034b and the first liquid-cooling section 2031b, and the seventh connecting pipe 32b is connected between the first liquid-cooling section 2031b and the second liquid outlet channel 22b.

[0085] The second liquid cooling plate 2 b has a plurality of cooling channels to increase the contact area between the battery cell and the first liquid cooling plate 2 a , thereby further dissipating heat from the battery cell 10 .

[0086] Therefore, an embodiment of the present application provides a battery, in which a liquid cooling plate with a coil structure is provided on the battery cell group to liquid-cool the battery cell group, so as to improve the heat dissipation efficiency and cycle life of the battery cells and reduce the risk of bulging. The liquid cooling plate includes a liquid inlet channel, a liquid outlet channel and a liquid cooling channel, and the liquid cooling channel has a first port and a second port, the first port is connected to the liquid inlet channel, and the second port is connected to the liquid outlet channel, and the liquid inlet channel and the liquid outlet channel are located on the same side of the liquid cooling channel. Therefore, the temperature of the coolant located in the liquid inlet channel is lower, and the temperature of the coolant located in the liquid outlet channel is higher. The flow channel of the liquid cooling plate is designed in a form in which high and low temperatures are adjacent and staggered, so that the temperature distribution of the entire liquid cooling plate is more uniform. In addition, the flow channel direction of the liquid cooling plate is perpendicular to the width direction of the battery, so as to achieve that the contact area between each battery cell and the liquid cooling plate is basically consistent, which is conducive to controlling the temperature difference between each battery cell.

[0087] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0088] The above is a detailed introduction to a battery provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, characterized in that: include: Battery cell pack; as well as A liquid cooling plate, the liquid cooling plate is used to liquid-cool the battery cell group; The liquid cooling plate includes a liquid inlet channel, a liquid outlet channel, and a liquid cooling channel. The liquid cooling channel has a first port and a second port. The first port is connected to the liquid inlet channel, and the second port is connected to the liquid outlet channel. The liquid inlet channel and the liquid outlet channel are located on the same side of the liquid cooling channel. The liquid inlet channel, the liquid outlet channel, and the liquid cooling channel are arranged at intervals along the width direction of the battery.

2. The battery according to claim 1, characterized in that The liquid cooling channel includes a first liquid cooling section and a second liquid cooling section that are interconnected. The liquid inlet channel, the liquid outlet channel, the first liquid cooling section, and the second liquid cooling section are sequentially spaced apart in the width direction of the battery.

3. The battery according to claim 2, characterized in that Also includes: A first connecting pipe, a second connecting pipe and a third connecting pipe, wherein the first connecting pipe is connected between the liquid inlet channel and the second liquid cooling section, the second connecting pipe is connected between the second liquid cooling section and the first liquid cooling section, and the third connecting pipe is connected between the first liquid cooling section and the liquid outlet channel.

4. The battery according to claim 1, characterized in that The liquid cooling channel includes a first liquid cooling segment, a second liquid cooling segment, a third liquid cooling segment, a fourth liquid cooling segment, a fifth liquid cooling segment, and a sixth liquid cooling segment that are interconnected. The liquid inlet channel, the liquid outlet channel, the first liquid cooling segment, the second liquid cooling segment, the third liquid cooling segment, the fourth liquid cooling segment, the fifth liquid cooling segment, and the sixth liquid cooling segment are arranged in sequence in the width direction of the battery.

5. The battery according to claim 4, characterized in that: Also includes: a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe, a fifth connecting pipe, a sixth connecting pipe and a seventh connecting pipe, wherein the first connecting pipe is connected between the liquid inlet channel and the second liquid cooling section, the second connecting pipe is connected between the second liquid cooling section and the third liquid cooling section, the third connecting pipe is connected between the third liquid cooling section and the sixth liquid cooling section, the fourth connecting pipe is connected between the sixth liquid cooling section and the fifth liquid cooling section, the fifth connecting pipe is connected between the fifth liquid cooling section and the fourth liquid cooling section, the sixth connecting pipe is connected between the fourth liquid cooling section and the first liquid cooling section, and the seventh connecting pipe is connected between the first liquid cooling section and the liquid outlet channel.

6. The battery according to claim 1, characterized in that: The liquid cooling plate is provided with a liquid inlet and a liquid outlet on a surface on a side away from the battery cell group. The liquid inlet is communicated with the liquid inlet channel, and the liquid outlet is connected to the liquid outlet channel. The liquid inlet and the liquid outlet are adjacently arranged.

7. The battery according to claim 1, characterized in that: The battery cell group includes a plurality of battery cells, each of the battery cells has a pole, and the pole is located on the side of the battery cell group. The liquid cooling plate is arranged on the top surface and / or bottom surface of the battery cell group.

8. The battery according to claim 7, characterized in that: There are multiple battery cell groups, and the multiple battery cell groups are arranged in the height direction of the battery. Any two adjacent battery cell groups are provided with one liquid cooling plate.

9. The battery according to claim 8, characterized in that: The liquid cooling plate has a first liquid cooling surface and a second liquid cooling surface arranged opposite to each other, the first liquid cooling surface contacts the bottom surface of the battery cell group, the second liquid cooling surface contacts the top surface of the battery cell group, and both the first liquid cooling surface and the second liquid cooling surface are flat.

10. The battery according to claim 1, characterized in that: Also includes: A thermally conductive gasket is arranged between the battery cell group and the liquid cooling plate.

11. The battery according to claim 1, characterized in that: The liquid cooling plate is an integrally formed structure and is arranged in an S shape.

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