Liquid cooling box body and battery pack

Abstract

The utility model relates to the technical field of battery pack heat management, and discloses a liquid cooling box body and a battery pack, according to the liquid cooling box body provided by the utility model, an installation cavity is separated by using at least one liquid cooling separation plate, and each separation cavity is used for installing one or two battery packs; according to the invention, the bottom surface and at least one side surface of the battery pack can exchange heat with the cooling medium, so that the cooling effect on each battery pack is improved, the temperatures of the battery packs are close to each other, and the situation of over-high local temperature is avoided; and meanwhile, the liquid cooling flow channels in the liquid cooling bottom plate, the liquid cooling flow channels in the plurality of liquid cooling edge beams and the liquid cooling flow channels in the plurality of liquid cooling partition plates are communicated, so that the space occupation of the water inlet and outlet pipelines on the battery pack can be reduced while the cooling area is increased and the heat exchange effect is improved, and the space utilization rate is improved.

Description

Technical Field

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

[0002] With the continuous advancement of power battery technology, power battery systems are increasingly being used in the automotive field. The temperature rise of the battery pack (including multiple cells arranged in sequence) has become an important factor restricting the performance and life of the power system. Improving the problem of excessive temperature in the cells and battery boxes in the battery pack can effectively improve the charging and discharging performance and life of the power system.

[0003] The current mainstream temperature control technology is divided into two temperature control methods: forced air cooling and liquid cooling. For the liquid cooling method, in the relevant technology, a liquid cooling plate is configured at the bottom of the battery pack, or a separate liquid cooling plate is only set on the side of the battery pack, and the battery cells in the battery pack are in contact with the liquid cooling plate through thermal conductive glue for heat conduction. However, with such a setting, the cooling effect is better on the side closer to the liquid cooling plate, which easily causes a large temperature gradient in the battery cell, making it difficult to form a uniform temperature, and unable to meet the needs of rapid cooling and refrigeration, resulting in poor cooling effect of the existing liquid cooling method. To this end, in order to achieve a better cooling effect for the battery cell, separate liquid cooling plates are configured at the bottom and sides of the battery pack in the prior art. However, since the flow channels of the side liquid cooling plate and the bottom liquid cooling plate are independently set, it is necessary to set the liquid inlet and outlet pipelines separately. The pipeline layout is complicated, and the internal space of the battery pack occupied is large, resulting in low space utilization. Utility Model Content

[0004] In view of this, the utility model provides a liquid cooling box to solve the problem that when separate liquid cooling plates are provided at the bottom and sides of the battery pack, the piping layout is complicated, the internal space of the battery pack is large, and the space utilization rate is low.

[0005] In the first aspect, the utility model provides a liquid-cooled box for heat exchange with a battery pack. Specifically, the liquid-cooled box includes a liquid-cooled bottom plate, a liquid-cooled side beam and a liquid-cooled partition plate. Wherein, there are multiple liquid-cooled side beams, and the multiple liquid-cooled side beams are connected to the liquid-cooled bottom plate, and the multiple liquid-cooled side beams and the liquid-cooled bottom plate enclose an installation chamber; there is at least one liquid-cooled partition plate, and the liquid-cooled partition plate is installed in the installation chamber, and at least one liquid-cooled partition plate divides the installation chamber into two or more independently arranged partition chambers, and any partition chamber is used for the installation of one or two groups of battery packs; wherein the liquid-cooled flow channel inside the liquid-cooled bottom plate, the liquid-cooled flow channels inside the multiple liquid-cooled side beams, and the liquid-cooled flow channels inside the multiple liquid-cooled partition plates are connected.

[0006] Beneficial effect: A plurality of liquid-cooled side beams and a liquid-cooled bottom plate are enclosed to form an installation chamber, and at least one liquid-cooled partition plate is arranged in the installation chamber to divide the installation chamber into two or more independent partition chambers. The installation chamber is separated by using a liquid-cooled partition plate, and each partition chamber is used for installing one or two battery packs, so that the bottom surface and at least one side surface of the battery pack can exchange heat with the cooling medium, thereby improving the cooling effect of each battery pack, making the temperature between each battery pack closer, and avoiding the situation where the local temperature is too high; at the same time, since the liquid-cooled flow channel inside the liquid-cooled bottom plate, the liquid-cooled flow channel inside the plurality of liquid-cooled side beams, and the liquid-cooled flow channel inside the plurality of liquid-cooled partition plates are connected, only one set of inlet and outlet water pipes can be set to realize the flow of the cooling medium in the liquid-cooled flow channel of the liquid-cooled bottom plate, the liquid-cooled side beam and the liquid-cooled partition plate, while increasing the cooling area and improving the heat exchange effect, the space occupied by the inlet and outlet water pipes on the battery pack can be reduced, thereby improving the space utilization rate. After each battery pack is installed, the cooling medium continuously flows in each liquid cooling channel, so that each battery pack can quickly dissipate heat, avoid heat accumulation, and keep each battery pack in a relatively low temperature environment for a long time.

[0007] In an optional embodiment, the plurality of liquid-cooled side beams include at least a liquid-cooled front side beam, a liquid-cooled rear side beam, a first liquid-cooled side beam and a second liquid-cooled side beam, the liquid-cooled front side beam is arranged opposite to the liquid-cooled rear side beam, and the first liquid-cooled side beam and the second liquid-cooled side beam are arranged opposite to each other; wherein, the main outlet of the liquid-cooled flow channel of the liquid-cooled front side beam is connected to the first liquid-cooled side beam, and the main inlet and main outlet of the liquid-cooled flow channel of the liquid-cooled rear side beam are respectively connected to the second liquid-cooled side beam and the first liquid-cooled side beam.

[0008] Beneficial effect: by making multiple liquid-cooled side beams include at least a liquid-cooled front side beam, a liquid-cooled rear side beam, a first liquid-cooled side beam and a second liquid-cooled side beam, and the liquid-cooled front side beam and the liquid-cooled rear side beam are arranged opposite to each other, and the first liquid-cooled side beam and the second liquid-cooled side beam are arranged opposite to each other, after the main liquid-cooled flow channels inside each liquid-cooled side beam are connected, a passage for the cooling medium to flow is formed to exchange heat for the battery pack.

[0009] In an optional embodiment, the liquid-cooled front beam is provided with a first branch inlet on the side end surface close to the liquid-cooled rear beam, and the liquid-cooled rear beam is provided with a first branch outlet on the side end surface close to the liquid-cooled front beam, and the first branch outlet is arranged opposite to the first branch inlet; the inlet and outlet of the liquid-cooled flow channel of the liquid-cooled partition plate are respectively connected to the first branch outlet and the first branch inlet.

[0010] Beneficial effect: By connecting the inlet and outlet of the liquid-cooled flow channel of the liquid-cooled partition plate to the first branch outlet of the liquid-cooled front side beam and the first branch inlet of the liquid-cooled rear side beam respectively, the cooling medium flows in the main path to the branch path in the liquid-cooled partition plate to achieve diversion.

[0011] In an optional embodiment, a second branch inlet is provided on the bottom end surface of the liquid-cooled front side beam, and a second branch outlet is provided on the bottom end surface of the liquid-cooled rear side beam; the liquid-cooled bottom plate is provided with a third branch outlet and a third branch inlet respectively connected to the second branch inlet and the second branch outlet.

[0012] In an optional embodiment, any of the liquid-cooled side beams is provided with a support area and a flow channel area, the support area is separated from the flow channel area, the liquid cooling flow channel inside the liquid-cooled side beam is formed in the flow channel area, and reinforcing ribs are provided in the support area.

[0013] Beneficial effects: By providing a support area at the liquid cooling side beam and providing reinforcing ribs in the support area, the strength of the liquid cooling box can be improved, and an additional flow channel area is provided to provide guidance for the cooling medium, so that the heat generated by the battery cells in each battery pack can be driven during the movement of the cooling medium.

[0014] In an optional embodiment, an anti-crush structure is provided inside the flow channel area of ​​at least one of the liquid-cooled side beams.

[0015] Beneficial effect: During the operation of the battery pack, the battery cells in each battery pack will generate a large expansion force. By installing an anti-crush structure in the flow channel area, the risk of the liquid cooling flow channel being crushed is reduced, ensuring that the cooling medium flows in the liquid cooling flow channel.

[0016] In an optional embodiment, a plurality of the anti-crush structures are provided inside the flow channel area of ​​at least one of the liquid-cooled side beams, and the plurality of the anti-crush structures are arranged at intervals along the height direction, and each of the anti-crush structures includes a connected horizontal section and a vertical section, and the flow channel area includes two opposite side walls, one end of the horizontal section is connected to one of the side walls of the flow channel area, and the other end of the horizontal section extends toward the other opposite side wall, and the vertical section is connected to the other end of the horizontal section, and a gap is left between the vertical section and the other side wall.

[0017] In an optional embodiment, the liquid-cooling box further includes a heating element, and one or more heating elements are provided, wherein one of the heating elements is arranged inside the flow channel area of ​​the second liquid-cooling side beam.

[0018] Beneficial effect: By adding a heating element, a heating function is provided for the cooling medium, ensuring that each battery cell can operate within the optimal temperature range even in a severe cold environment, effectively extending the service life of the battery pack, thereby improving the overall safety performance of the battery pack.

[0019] In an optional embodiment, in the first liquid-cooled side beam and the second liquid-cooled side beam, the second liquid-cooled side beam is used to install a liquid inlet component, and the first liquid-cooled side beam is used to install a liquid outlet component.

[0020] In an optional embodiment, a connecting plate is provided at the lower end of the first liquid-cooled side beam and the second liquid-cooled side beam on the opposite side, and the connecting plate is used for welding to the side of the liquid-cooled bottom plate.

[0021] Beneficial effect: By providing the connecting plate, the liquid-cooled side beam and the liquid-cooled bottom plate can be easily welded and connected.

[0022] In a second aspect, the utility model further provides a battery pack, comprising the liquid cooling box in the first aspect.

[0023] Beneficial effect: Because the battery pack includes a liquid cooling box, it has the same effect as the liquid cooling box and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A three-dimensional view of the liquid cooling box provided by the utility model;

[0026] Figure 2 An exploded view of the liquid cooling box provided by the utility model;

[0027] Figure 3 A three-dimensional view of a liquid-cooled front side beam in a liquid-cooled box provided by the utility model;

[0028] Figure 4 A front view of a liquid-cooled front side beam in a liquid-cooled box provided by the utility model;

[0029] Figure 5 A three-dimensional view of the second liquid-cooled side beam in the liquid-cooled box provided by the utility model;

[0030] Figure 6 for Figure 5 A partial enlarged view of part A;

[0031] Figure 7 A front view of a first liquid-cooling side beam in a liquid-cooling box provided by the utility model;

[0032] Figure 8 A schematic diagram of the flow of the cooling medium in the liquid cooling box provided by the utility model;

[0033] Fig. 9It is a flow diagram of the cooling medium in the liquid cooling box provided by the utility model flowing in the liquid cooling bottom plate.

[0034] Description of reference numerals:

[0035] 1. Liquid cooling base plate; 111. Third branch inlet; 112. Third branch outlet;

[0036] 2. Liquid-cooled side beam; 21. Liquid-cooled front side beam; 211. First branch entrance; 22. Liquid-cooled rear side beam; 221. First branch exit; 23. First liquid-cooled side beam; 231. Fourth branch entrance; 232. Fifth branch entrance; 24. Second liquid-cooled side beam; 25. Support area; 26. Flow channel area; 261. Side wall; 27. Anti-crushing structure; 271. Vertical section; 272. Horizontal section; 28. Connecting plate;

[0037] 3. Liquid cooling partition plate;

[0038] 4. Liquid inlet parts;

[0039] 5. Liquid outlet parts;

[0040] 6. Heating element;

[0041] 7. Sealing parts;

[0042] 8. Front panel;

[0043] 91. First cushion block; 92. Second cushion block. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0045] In the description of the present application, it should be understood that the terms "upper", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 should not be understood as a limitation on the present application.

[0046] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 this application can be understood according to specific circumstances.

[0048] See also Figures 1 to 9 , Figure 1 A three-dimensional view of a liquid cooling box provided by the present application is shown; Figure 2 An exploded view of the liquid cooling box provided by the present application is shown; Figure 3 A three-dimensional view of a liquid-cooled front side beam in a liquid-cooled box provided by the present application is shown; Figure 4 A front view of a liquid-cooled front side beam in a liquid-cooled box provided by the present application is shown; Figure 5 A three-dimensional view of a second liquid-cooled side beam in a liquid-cooled box provided by the present application is shown; Figure 6 for Figure 5 A partial enlarged view of part A; Figure 7 A front view of a first liquid-cooled side beam in a liquid-cooled box provided by the present application is shown; Figure 8 The figure shows the flow diagram of the cooling medium in the liquid cooling box provided by the present application. Figure 8 In the figure, the flow direction of the cooling medium is the direction of the arrow. Specifically, the flow direction of the cooling medium in each liquid-cooled side beam and the liquid-cooled partition plate is shown by the direction of the solid arrow, and the flow direction of the cooling medium between the liquid-cooled front side beam, the liquid-cooled bottom plate and the liquid-cooled rear side beam is shown by the direction of the dotted arrow; Fig. 9 A flow diagram showing the flow of the cooling medium in the liquid cooling box provided in the present application within the liquid cooling base plate.

[0049] Combine the following Figures 1 to 9 , describing an embodiment of the utility model.

[0050] In a first aspect, a liquid cooling box is provided, which is used for heat exchange of cells in each battery pack, and comprises a liquid cooling bottom plate 1, a liquid cooling side beam 2 and a liquid cooling partition plate 3. Specifically, Figure 1 and Figure 2As shown, a plurality of liquid-cooled side beams 2 are provided, and the plurality of liquid-cooled side beams 2 are all connected to the liquid-cooled bottom plate 1, and the plurality of liquid-cooled side beams 2 and the liquid-cooled bottom plate 1 enclose an installation chamber; at least one liquid-cooled partition plate 3 is provided, and the liquid-cooled partition plate 3 is installed in the installation chamber, and at least one liquid-cooled partition plate 3 divides the installation chamber into two or more independently arranged partition chambers, and any partition chamber is used for the installation of one or two groups of battery packs; wherein, the liquid-cooling flow channel inside the liquid-cooled bottom plate 1, the liquid-cooling flow channels inside the plurality of liquid-cooled side beams 2, and the liquid-cooling flow channels inside the plurality of liquid-cooled partition plates 3 are connected.

[0051] The liquid cooling box provided in this embodiment is used to enclose a plurality of liquid cooling side beams 2 and a liquid cooling bottom plate 1 to form an installation chamber, and at least one liquid cooling partition plate 3 is arranged in the installation chamber to divide the installation chamber into two or more independent partition chambers. By using the liquid cooling partition plate 3 to separate the installation chamber, each partition chamber is used for installing one or two battery packs, so that the bottom surface and at least one side surface of the battery pack can exchange heat with the cooling medium, thereby improving the cooling effect of each battery pack, making the temperature between each battery pack closer, and avoiding the situation of excessive local temperature; at the same time, since the liquid cooling flow channel inside the liquid cooling bottom plate 1, the liquid cooling flow channel inside the plurality of liquid cooling side beams 2 and the liquid cooling flow channel inside the plurality of liquid cooling partition plates 3 are connected, only one set of inlet and outlet water pipelines can be set to realize the cooling medium flowing in the liquid cooling flow channel of the liquid cooling bottom plate 1, the liquid cooling side beam 2 and the liquid cooling partition plate 3, while increasing the cooling area and improving the heat exchange effect, the space occupied by the inlet and outlet water pipelines on the battery pack can be reduced, thereby improving the space utilization rate.

[0052] Exemplarily, the cooling medium in the present application can also heat the battery pack after being heated, that is, the liquid cooling box in the present application can also be used to heat the battery pack.

[0053] It can be explained that the liquid-cooled box provided by the present application does not specifically limit the number of liquid-cooled side beams 2. It can be four or more, and in this case, the multiple liquid-cooled side beams 2 at least include a liquid-cooled front side beam 21, a liquid-cooled rear side beam 22, a first liquid-cooled side beam 23, and a second liquid-cooled side beam 24. The liquid-cooled front side beam 21 is arranged opposite to the liquid-cooled rear side beam 22, and the first liquid-cooled side beam 23 and the second liquid-cooled side beam 24 are arranged opposite to each other; wherein, the main outlet of the liquid-cooled flow channel of the liquid-cooled front side beam 21 is connected to the first liquid-cooled side beam 23, and the main inlet and main outlet of the liquid-cooled flow channel of the liquid-cooled rear side beam 22 are connected to the second liquid-cooled side beam 24 and the first liquid-cooled side beam 23, respectively.

[0054] By utilizing the liquid-cooled box provided in this embodiment, by making multiple liquid-cooled side beams 2 include at least a liquid-cooled front side beam 21, a liquid-cooled rear side beam 22, a first liquid-cooled side beam 23 and a second liquid-cooled side beam 24, and the liquid-cooled front side beam 21 and the liquid-cooled rear side beam 22 are arranged opposite to each other, and the first liquid-cooled side beam 23 and the second liquid-cooled side beam 24 are arranged opposite to each other, after the main liquid-cooled flow channels inside each liquid-cooled side beam 2 are connected, a passage for the cooling medium to flow is formed to exchange heat for the battery pack.

[0055] It can be explained that in the present application, the main entrance of the liquid-cooling flow channel of the liquid-cooled front side beam 21 is not connected to the second liquid-cooled side beam 24, so that the cooling medium can enter the liquid-cooled bottom plate 1 and the liquid-cooled partition plate 3 through the liquid-cooled rear side beam 22, and then enter the first liquid-cooled side beam 23 through the liquid-cooled front side beam 21, so as to carry out effective heat exchange with the battery pack.

[0056] Preferably, if Figure 1 and Figure 2 As shown, there are only four liquid-cooled side beams 2 , namely a liquid-cooled front side beam 21 , a liquid-cooled rear side beam 22 , a first liquid-cooled side beam 23 and a second liquid-cooled side beam 24 .

[0057] The liquid cooling box provided in the present application has a first branch entrance 211 formed on the side end surface of the liquid cooling front side beam 21 close to the liquid cooling rear side beam 22. Figures 1 to 3 As shown, a first branch outlet 221 is provided on the side end surface of the liquid-cooled rear side beam 22 close to the liquid-cooled front side beam 21, and the first branch outlet 221 is arranged opposite to the first branch inlet 211; the inlet and outlet of the liquid-cooled flow channel of the liquid-cooled partition plate 3 are respectively connected to the first branch outlet 221 and the first branch inlet 211.

[0058] By utilizing the liquid cooling box provided in this embodiment, the inlet and outlet of the liquid cooling flow channel of the liquid cooling partition plate 3 are connected to the first branch outlet 221 of the liquid cooling front side beam 21 and the first branch inlet 211 of the liquid cooling rear side beam 22 respectively, so that the cooling medium flows in the main path to the branch path in the liquid cooling partition plate 3, thereby realizing diversion.

[0059] It can be explained that the liquid cooling box provided in the present application does not specifically limit the number of first branch inlets 211 and first branch outlets 221, which is specifically the same as the number of liquid cooling partition plates 3, that is, each liquid cooling partition plate corresponds to a first branch inlet 211 and a first branch outlet 221, respectively.

[0060] As one of the embodiments, there are multiple first branch inlets 211 and multiple first branch outlets 221. In this case, multiple first branch inlets 211 are arranged at intervals, and multiple first branch outlets 221 are arranged at intervals. Multiple first branch inlets 211 and multiple first branch outlets 221 are arranged corresponding to multiple liquid-cooled partition plates 3. For example, there are N first branch inlets 211 and N first branch outlets 221, corresponding to N liquid-cooled partition plates 3, forming (N+1) partition chambers. At this time, one or more battery packs are installed inside a partition chamber. Preferably, a battery pack is installed inside a partition chamber, so that both sides of the battery pack can exchange heat with the liquid-cooled partition plate 3.

[0061] It should be noted that, during installation, the multiple battery cells in each battery pack are arranged along the length direction of the first liquid-cooled side beam 23 and the second liquid-cooled side beam 24 .

[0062] For example, Figure 2 and Figure 3 As shown, two first branch inlets 211 and two first branch outlets 221 are provided, and two liquid-cooling partition plates 3 are provided correspondingly to form three partition chambers.

[0063] It can be explained that the liquid cooling box provided in the present application has a second branch inlet at the bottom end surface of the liquid cooling front side beam 21, and a second branch outlet at the bottom end surface of the liquid cooling rear side beam 22; and Fig. 9 As shown, the liquid cooling base plate 1 is provided with a third branch outlet 112 and a third branch inlet 111 which are respectively connected with the second branch inlet and the second branch outlet.

[0064] like Figure 1 , Figure 2 and Figure 4 As shown, the liquid cooling box provided by the present application has a support area 25 and a flow channel area 26 on any liquid cooling side beam 2, the support area 25 is separated from the flow channel area 26, the liquid cooling flow channel inside the liquid cooling side beam is formed in the flow channel area, and a reinforcing rib is arranged in the support area. Figure 4 As shown, the flow channel area 26 of the liquid cooling side beam 2 can be formed along the thickness direction (i.e. Figure 4 A support area 25 is provided on one side away from the battery pack (in the left and right directions); Figure 6 As shown, a support area (not shown) is further provided at the bottom of the flow channel area 26. The reinforcing ribs may be Figure 4 The horizontal reinforcement shown in Figure 6 The inclined reinforcement ribs at the middle bottom are not limited to specific shapes.

[0065] By utilizing the liquid cooling box provided in this embodiment, a support area 25 is provided at the liquid cooling side beam 2, and reinforcing ribs are provided in the support area 25, so that the strength of the liquid cooling box can be improved. A flow channel area 26 is also provided to provide guidance for the cooling medium, so that the heat generated by the battery cells in each battery pack can be taken away during the movement of the cooling medium.

[0066] like Figure 3 , Figure 4 As shown, an anti-crush structure 27 is provided in the flow channel area 26 of at least one liquid-cooled side beam 2 .

[0067] By utilizing the liquid cooling box provided in this embodiment, during the operation of the battery pack, the battery cells in each battery group will generate a large expansion force. By installing an anti-crush structure 27 in the flow channel area 26, the risk of the liquid cooling flow channel being crushed is reduced, thereby ensuring that the cooling medium flows in the liquid cooling flow channel.

[0068] It can be explained that the liquid cooling box provided in the present application does not specifically limit the structure of the anti-crush structure 27, and only needs to be formed inside the flow channel area 26. For example, in this embodiment, Figure 4 As shown, the anti-crush structure 27 is in a "T" shape.

[0069] Furthermore, a plurality of anti-crushing structures 27 are provided, and the plurality of anti-crushing structures 27 are arranged at intervals along the height direction; further, the plurality of anti-crushing structures 27 are staggeredly arranged on two oppositely arranged side walls 261 inside the flow channel area 26 .

[0070] Furthermore, the liquid cooling box provided in the present application is only exemplified by taking the anti-crushing structure as a "T"-shaped structure as an example.

[0071] Specifically, a plurality of anti-crush structures 27 are provided inside the flow channel area 26 of at least one liquid-cooled side beam 2. The plurality of anti-crush structures 27 are arranged along the height direction (i.e. Figure 4 The flow channel area 26 includes at least one pair of opposite side walls 261, one end of the horizontal section 272 is connected to one of the side walls 261 of the flow channel area 26, and the other end of the horizontal section 272 extends toward the other side wall 261 arranged oppositely, and the vertical section 271 is connected to the other end of the horizontal section 272. There is a gap between the vertical section 271 and the other side wall 261, so that the flow channel area 26 has a certain compressible space. When the battery cell expands and squeezes the flow channel area 26, the flow channel area 26 can be deformed to buffer the expansion of the battery cell. At the same time, when the flow channel area 26 is squeezed to the point where the vertical section 271 abuts against the other side wall 261, the flow channel area can be prevented from being further compressed to affect the flow of the cooling medium, that is, to prevent the liquid cooling flow channel from being crushed. The vertical section 271 and the horizontal section 272 can be integrally formed or welded, etc., which is not limited here.

[0072] like Figure 2 and Figure 5 As shown, the lower ends of the first liquid-cooled side beam 23 and the second liquid-cooled side beam 24 on the opposite side are both provided with connecting plates 28, and the connecting plates 28 are used to be welded to the side of the liquid-cooled bottom plate 1. This facilitates the connection between the liquid-cooled side beam and the liquid-cooled bottom plate 1.

[0073] like Figure 1 and Figure 2 As shown, in the liquid-cooling box provided by the present application, in the first liquid-cooling side beam 23 and the second liquid-cooling side beam 24, the second liquid-cooling side beam 24 is used to install a liquid inlet component 4, such as a water inlet joint, and the first liquid-cooling side beam 23 is used to install a liquid outlet component 5, such as a water outlet joint.

[0074] Furthermore, the liquid inlet member 4 and the liquid outlet member 5 are respectively located outside the liquid cooling channel of the second liquid cooling side beam 24 and the liquid cooling channel of the first liquid cooling side beam 23 , and a blocking member 7 is additionally provided.

[0075] At this time, there is no specific limitation on the number and installation position of the blocking member 7. The blocking member 7 only needs to be installed at the opening of the liquid cooling side beam 2 to separate the liquid cooling channel from the outside. Preferably, the blocking member is a plate-shaped structure.

[0076] Specifically, in the first liquid-cooled side beam 23, the second liquid-cooled side beam 24, the liquid-cooled front side beam 21 and the liquid-cooled rear side beam 22, one pair of liquid-cooled side beams 2 has one, two, three or more openings respectively; the branch entrance and branch exit of the other pair of liquid-cooled side beams 2 are arranged on the two side end surfaces of the pair of liquid-cooled side beams 2 facing each other. At this time, the number of blocking members 7 is the sum of the number of openings of the liquid-cooled side beams 2. When installing, the blocking members 7 can be installed one by one at each opening.

[0077] As one of the implementation methods, Figures 1 to 3 , Figure 6 and Figure 7 As shown, openings connected to the liquid cooling flow channel are provided at both ends of the first liquid cooling side beam 23 along the length direction of the first liquid cooling side beam 23, and openings connected to the liquid cooling flow channel are provided at both ends of the second liquid cooling side beam 24 along the length direction of the second liquid cooling side beam 24. Therefore, in this embodiment, two pairs of blocking members 7 are provided, for a total of four. One pair of blocking members 7 is respectively installed at the two openings of the first liquid cooling side beam 23, and the other pair of blocking members 7 is respectively installed at the two openings of the second liquid cooling side beam 24.

[0078] Furthermore, a fourth branch entrance 231 and a fifth branch entrance 232 are provided on the side end surface of the first liquid-cooled side beam 23 close to the second liquid-cooled side beam 24, and the fourth branch entrance 231 is used to communicate with the main road outlet of the liquid-cooled rear side beam 22, and the fifth branch entrance 232 is used to communicate with the main road outlet of the liquid-cooled front side beam 21. Correspondingly, a fourth branch exit (not shown) is provided on the side end surface of the second liquid-cooled side beam 24 close to the first liquid-cooled side beam 23, and the fourth branch exit is used to communicate with the main road inlet of the liquid-cooled rear side beam 22.

[0079] As another embodiment, openings connected to the liquid cooling flow channel are provided at both ends of the liquid cooling front side beam 21 along the length direction of the liquid cooling front side beam 21, and openings connected to the liquid cooling flow channel are provided at both ends of the liquid cooling rear side beam 22 along the length direction of the liquid cooling rear side beam 22. Similarly, two pairs of blocking members 7 are provided, for a total of four. One pair of blocking members 7 is respectively installed at the two openings of the liquid cooling front side beam 21, and the other pair of blocking members 7 is respectively installed at the two openings of the liquid cooling rear side beam 22.

[0080] like Figure 1 , Figure 2 and Figures 5 to 7 As shown, the liquid cooling box provided by the present application further includes a heating element 6, and the heating element 6 is used to be installed in the flow channel area 26. Among them, there are one or more heating elements 6.

[0081] As one implementation manner, one of the heating elements 6 is installed inside the flow channel area 26 of the second liquid-cooled side beam 24 .

[0082] Furthermore, at this time, a heating element 6 is installed close to the liquid inlet element 4 to heat the cooling medium entering the liquid cooling box.

[0083] As one embodiment, two heating elements 6 are provided, wherein one heating element 6 is installed inside the flow channel area 26 of the second liquid-cooled side beam 24 , and the other heating element 6 is installed inside the flow channel area 26 of the first liquid-cooled side beam 23 .

[0084] By utilizing the liquid cooling box provided in this embodiment and adding a heating element 6, a heating function is provided for the cooling medium, thereby ensuring that each battery cell can operate within the optimal temperature range even in a severely cold environment, effectively extending the service life of the battery pack, thereby improving the overall safety performance of the battery pack.

[0085] Of course, in other optional embodiments, three or more heating elements 6 are provided, for example, the heating element 6 may also be installed in the liquid-cooled front side beam 21 and / or the liquid-cooled rear side beam 22 .

[0086] Similarly, the liquid cooling box provided in the above embodiment does not specifically limit the installation method of the liquid inlet 4 and the liquid outlet 5, and the liquid inlet 4 and the liquid outlet 5 only need to be installed on the blocking member 7. Preferably, the liquid inlet 4 and the liquid outlet 5 are welded to the blocking member 7.

[0087] like Figure 1 and Figure 2 As shown, the liquid cooling box provided by the present application also includes a front panel 8, a first pad 91 and a second pad 92. Among them, the first pad 91 is installed at the liquid cooling front side beam 21, and the second pad 92 is installed at the liquid cooling rear side beam 22. During installation, the first pad 91 and the second pad 92 can be fixedly installed on the side of the liquid cooling base plate 1, and the front panel 8 can be fixedly installed above the first pad 91 arranged near the liquid cooling front side beam 21. The first pad 91 and the second pad 92 can block the pipelines on both sides of the liquid cooling base plate 1, and the first pad 91 can also be used to fix the front panel 8.

[0088] It can be explained that, in the above embodiment, there is no specific limitation on the connection method between the front panel 8, the first cushion block 91, the second cushion block 92, each liquid-cooling side beam 2, each liquid-cooling partition plate 3 and the liquid-cooling bottom plate 1. They can be directly connected, such as welding, or indirectly connected, such as through angle brackets.

[0089] Preferably, welding is used in the present application. Specifically, during installation, the liquid inlet 4 and the liquid outlet 5 are respectively welded to the two sealing parts 7 to form two integrated blocks, and then the two integrated blocks are respectively welded to the first liquid-cooled side beam 23 and the second liquid-cooled side beam 24; the first cushion block 91 and the second cushion block 92 are welded to the side of the liquid-cooled bottom plate 1, and then the liquid-cooled bottom plate 1 is welded to the first liquid-cooled side beam 23 and the second liquid-cooled side beam 24, and then the front panel 8 is welded above the first cushion block 91; finally, the liquid-cooled front side beam 21, the liquid-cooled rear side beam 22 and the liquid-cooled partition plate 3 are welded to the aforementioned whole.

[0090] It should be noted that, in the aforementioned embodiment, the first pad 91, the second pad 92 and the liquid-cooled base plate 1 are fixed by stir friction welding; the liquid-cooled base plate 1 and the first liquid-cooled side beam 23 and the second liquid-cooled side beam 24 are fixed by stir friction welding.

[0091] like Figures 1 to 3 , Figure 5 , Figure 6 , Figure 8 and Fig. 9As shown, the flow path of the cooling medium is: the cooling medium enters the second liquid-cooled side beam 24 at the liquid inlet 4, and then enters the liquid-cooled rear beam 22 along the main road inlet of the liquid-cooled rear beam 22, and is divided at the liquid-cooled rear beam 22 to form three groups of cooling media, one of which enters the interior of multiple liquid-cooled partition plates 3 at each first branch outlet 221, the second group of cooling medium enters the interior of the liquid-cooled bottom plate 1 at the third branch inlet 111, and the third group of cooling medium enters the interior of the first liquid-cooled side beam 23 at the fourth branch inlet 231; then convergence is performed, and the process is: the first group of cooling medium flows inside each liquid-cooled partition plate 3, and the second group of cooling medium flows in the liquid-cooled bottom plate 1, until both groups of cooling medium enter the interior of the liquid-cooled front beam 21, complete the initial convergence, and then enter the interior of the first liquid-cooled side beam 23 to complete the convergence with the third group of cooling medium.

[0092] By utilizing the liquid-cooling box provided in this embodiment, the liquid-cooling bottom plate 1, each liquid-cooling side beam 2, each liquid-cooling partition plate 3, the liquid inlet part 4, the liquid outlet part 5, the sealing part 7, the front panel 8, the first pad 91 and the second pad 92 are welded together so that the molded box has good sealing performance; at the same time, by arranging the liquid-cooling flow channel in a form of being built-in into the shell, after the subsequent battery pack is formed, the use of pipes and joints in the battery pack can be reduced, thereby achieving lightweight, increasing the mass energy density of the battery pack, and improving the utilization rate of the battery pack; in addition, by setting the liquid-cooling partition plate 3, the heat exchange area can be increased and the cooling efficiency can be improved.

[0093] It can be explained that, in the above-mentioned embodiment, the shape of the liquid-cooling flow channel inside the liquid-cooling base plate 1 is not specifically limited, and its flow path only needs to include the entire liquid-cooling base plate. Preferably, in this embodiment, the liquid-cooling flow channel inside the liquid-cooling base plate 1 is arranged in a winding manner, such as an "S" shape; or the liquid-cooling flow channel inside the liquid-cooling base plate 1 is a plurality of parallel liquid-cooling flow channels, each of which extends in a straight line from the liquid-cooled rear side beam 22 to the liquid-cooled front side beam 21. Specifically, the liquid-cooling base plate 1 can be provided with a plurality of third branch inlets 111 and a plurality of third branch outlets 112 (not shown), and the plurality of third branch inlets 111 are arranged along the extension direction of the liquid-cooled front side beam (i.e. Fig. 9 The third branch outlets 112 and the third branch inlets 111 are arranged in a one-to-one correspondence, and each group of correspondingly arranged third branch outlets 112 and third branch inlets 111 are connected to a liquid cooling channel of the liquid cooling base plate 1. The number of the third branch inlets 111 and the third branch outlets 112 is not limited in the present application.

[0094] In a second aspect, a battery pack is also provided, comprising the liquid cooling box mentioned in the first aspect.

[0095] It can be explained that the battery pack provided by the present application also includes a battery pack, in which case the battery pack and the partition chamber are arranged in a certain ratio. For example, the battery pack and the partition chamber are arranged in a one-to-one ratio, in which case one battery pack is installed inside one partition chamber. Of course, two battery packs can also be installed inside one partition chamber.

[0096] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A liquid cooling box for heat exchange with a battery pack, characterized in that: include: Liquid cooling base plate (1); A liquid-cooled side beam (2), wherein a plurality of the liquid-cooled side beams (2) are provided, the plurality of the liquid-cooled side beams (2) are all connected to the liquid-cooled bottom plate (1), and the plurality of the liquid-cooled side beams (2) and the liquid-cooled bottom plate (1) enclose a mounting chamber; A liquid-cooled partition plate (3), wherein at least one of the liquid-cooled partition plates (3) is provided, and the liquid-cooled partition plate (3) is installed in the installation chamber, and at least one of the liquid-cooled partition plates (3) divides the installation chamber into two or more independently arranged partition chambers, and any partition chamber is used for installing one or two battery groups; The liquid cooling channel inside the liquid cooling bottom plate (1), the liquid cooling channel inside the plurality of liquid cooling side beams (2), and the liquid cooling channel inside the plurality of liquid cooling partition plates (3) are connected.

2. The liquid cooling box according to claim 1, characterized in that: The plurality of liquid-cooled side beams (2) at least include a liquid-cooled front side beam (21), a liquid-cooled rear side beam (22), a first liquid-cooled side beam (23) and a second liquid-cooled side beam (24); the liquid-cooled front side beam (21) and the liquid-cooled rear side beam (22) are arranged opposite to each other, and the first liquid-cooled side beam (23) and the second liquid-cooled side beam (24) are arranged opposite to each other; The main outlet of the liquid-cooling channel of the liquid-cooled front beam (21) is connected to the first liquid-cooled side beam (23), and the main inlet and main outlet of the liquid-cooling channel of the liquid-cooled rear beam (22) are respectively connected to the second liquid-cooled side beam (24) and the first liquid-cooled side beam (23).

3. The liquid cooling box according to claim 2, characterized in that: A first branch entrance (211) is provided on a side end surface of the liquid-cooled front side beam (21) close to the liquid-cooled rear side beam (22), and a first branch exit (221) is provided on a side end surface of the liquid-cooled rear side beam (22) close to the liquid-cooled front side beam (21), and the first branch exit (221) is arranged opposite to the first branch entrance (211); The inlet and outlet of the liquid cooling flow channel of the liquid cooling partition plate (3) are respectively connected to the first branch outlet (221) and the first branch inlet (211).

4. The liquid cooling box according to claim 2, characterized in that: A second branch entrance is provided on the bottom end surface of the liquid-cooled front side beam (21), and a second branch exit is provided on the bottom end surface of the liquid-cooled rear side beam (22); The liquid cooling bottom plate (1) is provided with a third branch outlet (112) and a third branch inlet (111) respectively connected to the second branch inlet and the second branch outlet.

5. The liquid cooling box according to any one of claims 2 to 4, characterized in that: Any of the liquid-cooled side beams (2) is provided with a support area (25) and a flow channel area (26), the support area (25) is separated from the flow channel area (26), the liquid-cooled flow channel inside the liquid-cooled side beam (2) is formed in the flow channel area (26), and reinforcing ribs are provided in the support area (25).

6. The liquid cooling box according to any one of claims 2 to 4, characterized in that: An anti-crush structure (27) is provided inside the flow channel area (26) of at least one of the liquid-cooled side beams (2).

7. The liquid cooling box according to claim 6, characterized in that: A plurality of the anti-crush structures (27) are provided inside the flow channel area (26) of at least one of the liquid-cooled side beams (2), and the plurality of the anti-crush structures (27) are arranged at intervals along the height direction, and each of the anti-crush structures (27) includes a horizontal section (272) and a vertical section (271) connected to each other. The flow channel area (26) includes two opposite side walls (261), one end of the horizontal section (272) is connected to one of the side walls (261) of the flow channel area (26), and the other end of the horizontal section (272) extends toward the other side wall (261) arranged oppositely, and the vertical section (271) is connected to the other end of the horizontal section (272), and a gap is left between the vertical section (271) and the other side wall (261).

8. The liquid cooling box according to any one of claims 2 to 4, characterized in that: Also includes: A heating element (6), wherein one or more heating elements (6) are provided, and any of the liquid-cooled side beams (2) is provided with a flow channel area (26), wherein the liquid-cooled flow channel inside the liquid-cooled side beam (2) is formed in the flow channel area (26), and one of the heating elements (6) is arranged inside the flow channel area (26) of the second liquid-cooled side beam (24).

9. The liquid cooling box according to any one of claims 2 to 4, characterized in that: In the first liquid-cooled side beam (23) and the second liquid-cooled side beam (24), the second liquid-cooled side beam (24) is used to install the liquid inlet component (4), and the first liquid-cooled side beam (23) is used to install the liquid outlet component (5); And / or, the lower ends of the first liquid-cooled side beam (23) and the second liquid-cooled side beam (24) on the opposite side are both provided with connecting plates (28), and the connecting plates (28) are used for welding to the side of the liquid-cooled bottom plate (1).

10. A battery pack, characterized in that: It comprises the liquid cooling box according to any one of claims 1 to 9.

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