Battery boxes, battery packs and vehicles

Abstract

The utility model provides a battery case, a battery pack and a vehicle, wherein the battery case comprises a bottom plate and a peripheral plate, wherein the peripheral plate is arranged circumferentially around the bottom plate, wherein the peripheral plate comprises a side plate and a transition portion, wherein the transition portion is arranged on one side of the side plate along the thickness direction of the side plate, wherein the transition portion has a liquid inlet main channel, a liquid outlet main channel, a liquid outlet and a liquid inlet, wherein the liquid outlet and the liquid inlet are respectively connected to the liquid outlet main channel and the liquid inlet main channel, wherein the liquid inlet is used to be connected to the liquid inlet nozzle of the liquid cooling plate, wherein the liquid outlet is used to be connected to the liquid outlet nozzle of the liquid cooling plate, wherein the side plate is provided with a liquid inlet channel and a liquid outlet channel for communicating with the outside world, wherein the liquid inlet channel is connected to the liquid inlet main channel, and wherein the liquid outlet channel is connected to the liquid outlet main channel. The battery case of the utility model can not only improve the space utilization rate of the battery case, but also ensure the structural strength of the battery case.

Description

Technical Field

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

[0002] Battery thermal management systems include a variety of layouts, among which the mainstream liquid cooling system usually includes a main supply and return pipeline and multiple supply and return branch pipes that are connected to the main supply and return pipelines and are respectively connected to different liquid cooling plates. The number of pipelines in the above liquid cooling system is relatively large, resulting in low space utilization of the battery box. In related technologies, manufacturers directly integrate part of the pipelines or flow channels into the side panels of the box. Although the above layout structure can improve the space utilization of the battery box, directly setting the pipelines or flow channels in the side panels will reduce the structural strength of the battery box and affect the service life of the battery box. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art.

[0004] To this end, an embodiment of the utility model provides a battery box, which can not only improve the space utilization of the battery box, but also ensure the structural strength of the battery box.

[0005] An embodiment of the present invention further provides a battery pack.

[0006] An embodiment of the utility model further provides a vehicle.

[0007] The battery box of the utility model embodiment includes: a bottom plate and a peripheral plate, the peripheral plate is arranged around the circumference of the bottom plate, the peripheral plate includes a side plate and a transition part, the transition part is arranged on one side of the side plate along the thickness direction of the side plate, the transition part has a main liquid inlet channel, a main liquid outlet channel, a liquid outlet and a liquid inlet, the liquid outlet and the liquid inlet are respectively connected to the main liquid outlet channel and the main liquid inlet channel, the liquid inlet is used to be connected to the liquid inlet nozzle of the liquid cooling plate, the liquid outlet is used to be connected to the liquid outlet nozzle of the liquid cooling plate, the side plate is provided with a liquid inlet channel and a liquid outlet channel for communicating with the outside world, the liquid inlet channel is connected to the main liquid inlet channel, and the liquid outlet channel is connected to the main liquid outlet channel.

[0008] According to the battery case of the embodiment of the utility model, since the adapter is arranged on one side of the thickness direction of the side plate, and the main liquid inlet channel, the main liquid outlet channel, the liquid outlet and the liquid inlet are arranged on the adapter to reduce the number of channels opened on the side plate, the structural strength and support stability of the side plate can be guaranteed. And since the liquid inlet is connected to the liquid inlet nozzle of the liquid cooling plate, and the liquid outlet is connected to the liquid outlet nozzle of the liquid cooling plate, the side plate is provided with a liquid inlet channel and a liquid outlet channel for communicating with the outside world, the liquid inlet channel is connected to the main liquid inlet channel, and the liquid outlet channel is connected to the main liquid outlet channel, so the main supply and return pipeline of the outside world can be connected to the liquid inlet channel and the liquid outlet channel, and then transported to the liquid cooling plate through the adapter, thereby eliminating the complex supply and return branch pipes in the related technology, which is conducive to improving the space utilization of the battery case. Therefore, the battery case of the embodiment of the utility model can not only improve the space utilization of the battery case, but also ensure the structural strength of the battery case, which is conducive to extending the service life of the battery case.

[0009] In some embodiments, the liquid inlet includes a first liquid inlet and a second liquid inlet, the liquid outlet includes a first liquid outlet and a second liquid outlet, the adapter includes an upper end face and a lower end face relative to each other in a first direction, the first direction is the height direction of the battery case, the first liquid outlet and the first liquid inlet are located on the upper end face, and the second liquid outlet and the second liquid inlet are located on the lower end face.

[0010] In some embodiments, in the first direction, the upper end surface and the lower end surface are respectively flush with both side end surfaces of the side plate.

[0011] In some embodiments, the liquid inlet further includes a third liquid inlet, the liquid outlet further includes a third liquid outlet, and the third liquid inlet and the third liquid outlet are located on the inner side surface of the adapter.

[0012] In some embodiments, the transition portion and the side plate are integrally die-cast.

[0013] In some embodiments, the side plate includes a front end plate and a rear end plate, the front end plate and the rear end plate are arranged relatively to each other along the length direction of the base plate, and the transition portion is provided on at least one of the front end plate and the rear end plate.

[0014] A battery pack according to another embodiment of the present invention comprises: a battery case, which is any one of the battery cases described in the embodiments of the present invention; a battery cell, which is disposed in the battery case; and a liquid cooling plate, which is disposed in the battery case, and / or the liquid cooling plate is formed in the bottom plate.

[0015] According to the battery pack of the embodiment of the utility model, since the adapter is arranged on one side of the thickness direction of the side plate, and the main liquid inlet channel, the main liquid outlet channel, the liquid outlet and the liquid inlet are arranged on the adapter to reduce the number of channels opened on the side plate, the structural strength and support stability of the side plate can be guaranteed. And since the liquid inlet is connected to the liquid inlet nozzle of the liquid cooling plate, and the liquid outlet is connected to the liquid outlet nozzle of the liquid cooling plate, the side plate is provided with a liquid inlet channel and a liquid outlet channel for communicating with the outside world, the liquid inlet channel is connected to the main liquid inlet channel, and the liquid outlet channel is connected to the main liquid outlet channel, so the main supply and return pipeline of the outside world can be connected to the liquid inlet channel and the liquid outlet channel, and then transported to the liquid cooling plate through the adapter, thereby eliminating the complex supply and return branch pipes in the related technology, which is beneficial to improve the space utilization of the battery box. Therefore, the battery pack of the embodiment of the utility model can not only improve the space utilization of the battery box, but also ensure the structural strength of the battery box, which is beneficial to extend the service life of the battery box.

[0016] In some embodiments, the liquid cooling plate includes a top plate liquid cooling plate, a battery cell liquid cooling plate and a bottom plate liquid cooling plate, the top plate liquid cooling plate is arranged on the top surface of the battery cell, the battery cell liquid cooling plate is arranged on the bottom surface of the battery cell and / or the side surface of the battery cell, and the bottom plate liquid cooling plate is formed in the bottom plate.

[0017] In some embodiments, the top plate liquid cooling plate has a first water nozzle plugged into the adapter part, and a first sealing layer is provided between the outer peripheral surface of the first water nozzle and the adapter part, as well as between the contact surface of the top plate liquid cooling plate and the adapter part; and / or, the bottom plate liquid cooling plate has a second water nozzle plugged into the adapter part, and a second sealing layer is provided between the outer peripheral surface of the second water nozzle and the adapter part, as well as between the contact surface of the bottom plate liquid cooling plate and the adapter part; and / or, the battery cell liquid cooling plate has a water inlet branch pipe, and a third sealing layer is provided between the outer peripheral surface of the water inlet branch pipe and the adapter part.

[0018] A vehicle according to another embodiment of the present invention comprises a battery pack as described in any one of the embodiments of the present invention.

[0019] According to the vehicle of the embodiment of the utility model, since the adapter is arranged on one side of the thickness direction of the side plate, and the main liquid inlet channel, the main liquid outlet channel, the liquid outlet and the liquid inlet are arranged on the adapter to reduce the number of channels opened on the side plate, the structural strength and support stability of the side plate can be ensured. And since the liquid inlet is connected to the liquid inlet nozzle of the liquid cooling plate, and the liquid outlet is connected to the liquid outlet nozzle of the liquid cooling plate, the side plate is provided with a liquid inlet channel and a liquid outlet channel for communicating with the outside world, the liquid inlet channel is connected to the main liquid inlet channel, and the liquid outlet channel is connected to the main liquid outlet channel, so the main supply and return pipeline of the outside world can be connected to the liquid inlet channel and the liquid outlet channel, and then transported to the liquid cooling plate through the adapter, thereby eliminating the complex supply and return branch pipes in the related technology, which is conducive to improving the space utilization of the battery box. Therefore, the vehicle of the embodiment of the utility model can not only improve the space utilization of the battery box, but also ensure the structural strength of the battery box, which is conducive to extending the service life of the battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded view of a battery pack according to an embodiment of the present invention.

[0021] Figure 2 This is an exploded view of the battery box (without the bottom plate) and the liquid cooling plate of an embodiment of the utility model.

[0022] Figure 3 This is an exploded view of the battery box of an embodiment of the utility model.

[0023] Figure 4 It is a schematic diagram of the outer peripheral plate of the battery box according to an embodiment of the utility model.

[0024] Figure 5 This is a schematic diagram of another perspective of the outer peripheral plate of the battery box of an embodiment of the utility model.

[0025] Figure 6 This is a schematic diagram of the installation of the battery box and the battery cell liquid cooling plate according to an embodiment of the utility model.

[0026] Figure 7 It is a partial cross-sectional view of a battery pack according to an embodiment of the present utility model.

[0027] Figure 8 It is a partial cross-sectional view of the battery pack (excluding the top plate liquid cooling plate and the battery cell liquid cooling plate) of an embodiment of the present utility model.

[0028] Description of Figure Numbers:

[0029] 1. Bottom plate;

[0030] 2. Peripheral plate; 21. Side plate; 211. Liquid inlet channel; 212. Liquid outlet channel; 213. Front end plate; 214. Rear end plate; 22. Adapter; 221. Liquid inlet; 2211. First liquid inlet; 2212. Second liquid inlet; 2213. Third liquid inlet; 222. Liquid outlet; 2221. First liquid outlet; 2222. Second liquid outlet; 2223. Third liquid outlet; 223. Upper end surface; 224. Lower end surface; 225. Liquid inlet main channel; 226. Liquid outlet main channel;

[0031] 31. first sealing layer; 32. second sealing layer; 33. third sealing layer;

[0032] 4. Liquid cooling plate; 41. Top plate liquid cooling plate; 411. First water nozzle; 42. Cell liquid cooling plate; 421. Water diversion branch pipe; 4211. Flange; 43. Bottom plate liquid cooling plate; 431. Second water nozzle;

[0033] 5. Battery cell. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0035] Please refer to the following Figure 1-8 A battery box, a battery pack and a vehicle according to an embodiment of the utility model are described.

[0036] like Figures 1 to 8 As shown, the battery box of the utility model embodiment includes a bottom plate 1 and a peripheral plate 2, the peripheral plate 2 is arranged circumferentially around the bottom plate 1, the peripheral plate 2 includes a side plate 21 and a transition portion 22, the transition portion 22 is arranged on one side of the side plate 21 along the thickness direction of the side plate 21, the transition portion 22 has a liquid inlet main channel 225, a liquid outlet main channel 226, at least one liquid outlet 222 and at least one liquid inlet 221, the liquid outlet 222 and the liquid inlet 221 are respectively connected to the liquid outlet main channel 226 and the liquid inlet main channel 225, the liquid inlet 221 is used to connect with the liquid inlet nozzle of the liquid cooling plate 4, the liquid outlet 222 is used to connect with the liquid outlet nozzle of the liquid cooling plate 4, the side plate 21 is provided with a liquid inlet channel 211 and a liquid outlet channel 212 for communicating with the outside, the liquid inlet channel 211 is connected to the liquid inlet main channel 225, and the liquid outlet channel 212 is connected to the liquid outlet main channel 226.

[0037] According to the battery case of the embodiment of the utility model, since the adapter part 22 is arranged on one side of the thickness direction of the side plate 21, and the main liquid inlet channel 225, the main liquid outlet channel 226, the liquid outlet 222 and the liquid inlet 221 are arranged on the adapter part 22 to reduce the number of channels opened on the side plate 21, the structural strength of the side plate 21 and the stability of the support can be ensured. And because the liquid inlet 221 is connected to the liquid inlet nozzle of the liquid cooling plate 4, and the liquid outlet 222 is connected to the liquid outlet nozzle of the liquid cooling plate 4, the side plate 21 is provided with a liquid inlet channel 211 and a liquid outlet channel 212 for communicating with the outside world, the liquid inlet channel 211 is connected to the liquid inlet main channel 225, and the liquid outlet channel 212 is connected to the liquid outlet main channel 226, so the main supply and return pipeline of the outside world can be connected to the liquid inlet channel 211 and the liquid outlet channel 212, and then transported to the liquid cooling plate 4 through the adapter 22, thereby eliminating the complex supply and return branch pipes in the related technology, which is conducive to improving the space utilization of the battery box. Therefore, the battery box of the embodiment of the utility model can not only improve the space utilization of the battery box, but also ensure the structural strength of the battery box, which is conducive to extending the service life of the battery box.

[0038] It is understandable that if Figures 3 to 5 and Figure 7 As shown, the liquid inlet main channel 225 is connected to the liquid inlet port 221 and the liquid inlet channel 211, and the liquid outlet main channel 226 is connected to the liquid outlet port 222 and the liquid outlet channel 212, and the liquid inlet main channel 225 and the liquid outlet main channel 226 are independent of each other and are not connected to each other.

[0039] “The adapter 22 is disposed on one side of the side plate 21 along the thickness direction of the side plate 21” can be understood as the adapter 22 can be disposed on the inner side of the side plate 21 (the side of the side plate 21 adjacent to the battery cell 5) or the outer side of the side plate 21 (the side of the side plate 21 facing away from the battery cell 5). Since the adapter 22 is disposed on the inner side or the outer side of the side plate 21 along the thickness direction of the side plate 21, the liquid inlet main channel 225, the liquid outlet main channel 226, the liquid outlet 222 and the liquid inlet 221 do not need to occupy the space in the side plate 21, so as to avoid the problem of opening a hole in the side plate 21 and reducing the structural strength of the side plate 21.

[0040] It should be noted that if Figure 4 As shown, one end of the liquid inlet channel 211 is connected to the liquid inlet main channel 225, and the other end is connected to the external liquid inlet main channel. One end of the liquid outlet channel 212 is connected to the liquid outlet main channel 226, and the other end is connected to the external liquid outlet main channel.

[0041] It can be understood that when supplying liquid to the liquid cooling plate 4, the main liquid inlet channel 225 and the main liquid outlet channel 226 can be used to connect the main liquid inlet and liquid outlet channels. After the coolant enters the adapter 22, it flows into the liquid cooling plate 4 through the liquid inlet 221. After circulating in the liquid cooling plate 4, the coolant flows back to the adapter 22 through the liquid outlet 222 and flows out through the main liquid outlet channel 226. Since the adapter 22 is directly connected to the water nozzles (liquid inlet nozzle and liquid outlet nozzle) of the liquid cooling plate 4, the setting of the liquid supply branch pipeline is omitted, the number of pipelines is reduced, and the problem of easy leakage at the pipeline connection can be avoided. The adapter 22 of the present application is arranged on the inner side of the side panel 21. Compared with the method of directly setting a flow channel inside the side panel 21 of the box body and supplying liquid through the outlet on the side panel 21 (that is, using the side panel 21 itself as a adapter structure), the overall structural strength of the box body will not be reduced.

[0042] Alternatively, if Figure 3 and Figure 4 As shown, the liquid inlet 221 includes a first liquid inlet 2211 and a second liquid inlet 2212, the liquid outlet 222 includes a first liquid outlet 2221 and a second liquid outlet 2222, and the adapter 22 includes an upper end surface 223 and a lower end surface 224 opposite to each other in a first direction, and the first direction is the height direction of the battery box (such as Figure 2 In the up and down direction), the first liquid outlet 2221 and the first liquid inlet 2211 are located on the upper end surface 223, and the second liquid outlet 2222 and the second liquid inlet 2212 are located on the lower end surface 224. It should be noted that in order to enhance the cooling effect on the battery cell 5, the battery pack is usually provided with a plurality of liquid cooling plates 4 to cool different sides of the battery cell 5. For example, a conventional battery pack is usually provided with a top plate liquid cooling plate 41 and a bottom plate liquid cooling plate 43. The present application constructs a set of liquid inlets 221 and liquid outlets 222 on the upper and lower end surfaces of the adapter 22, respectively, which can adapt to the assembly requirements of the top plate liquid cooling plate 41 and the bottom plate liquid cooling plate 43 of the conventional battery pack to ensure the cooling effect of the battery pack.

[0043] In one example, if Figure 4 and Figure 5 As shown, in the first direction, the upper end surface 223 and the lower end surface 224 are respectively flush with the end surfaces of the side panels 21. Therefore, after the water nozzle of the top plate liquid cooling plate 41 is plugged into the adapter 22, the top plate liquid cooling plate 41 is basically in contact with the upper end surface 223 of the adapter 22, which is conducive to assembly and sealing, and at the same time, it prevents the water nozzle part structure from being exposed to the outside. Similarly, after the water nozzle of the bottom plate liquid cooling plate 43 is plugged into the adapter 22, the bottom plate liquid cooling plate 43 is basically in contact with the lower end surface 224 of the adapter 22, which is conducive to the assembly and sealing of the battery box and makes the structure of the battery box more compact.

[0044] Alternatively, if Figure 5As shown, the liquid inlet 221 also includes a third liquid inlet 2213, and the liquid outlet 222 also includes a third liquid outlet 2223, and the third liquid inlet 2213 and the third liquid outlet 2223 are located on the inner side of the adapter 22. It should be noted that the battery pack is not limited to only including the top plate liquid cooling plate 41 and the bottom plate liquid cooling plate 43. For example, a liquid cooling plate 4 is also provided between the battery cell rows of some battery packs. In this application, by constructing the third liquid inlet 2213 and the third liquid outlet 2223 on the inner side of the adapter 22, the cooling liquid supply and return requirements of the liquid cooling plate 4 of the above embodiment can be met.

[0045] In addition, it should be noted that the liquid cooling plate 4 inside the battery pack is not limited to being provided only between the battery cell rows. For example, the present application also proposes a technical solution of providing a battery cell liquid cooling plate 42 at the bottom of the battery cell 5. When liquid is supplied to the battery cell liquid cooling plate 42, the third liquid inlet 2213 and the third liquid outlet 2223 can be arranged at intervals in the width direction of the box body; and when liquid is supplied to the battery cell liquid cooling plate 42 between the battery cell rows, since the battery cell liquid cooling plate 42 is arranged vertically, the third liquid inlet 2213 and the third liquid outlet 2223 can be arranged at intervals in the height direction of the box body. In other words, the layout of the third liquid inlet 2213 and the third liquid outlet 2223 depends on the needs.

[0046] For example, the inlet channel 211 and the outlet channel 212 are both arranged along the second direction, which is the thickness direction of the side plate 21. Thus, the inlet channel 211 and the outlet channel 212 have the shortest arrangement distance, further reducing the impact on the structural strength of the side plate 21.

[0047] Optionally, the adapter part 22 and the side plate 21 are integrally die-cast, that is, the adapter part 22 and the side plate 21 are an integrated part and are formed by die-casting, thereby improving the connection strength between the adapter part 22 and the side plate 21 and ensuring the reliability of the support and connection of the peripheral plate 2.

[0048] In one example, if Figure 2 As shown, the side plate 21 includes a front side end plate 213 and a rear side end plate 214, and the front side end plate 213 and the rear side end plate 214 are arranged along the length direction of the bottom plate 1 (such as Figure 2The adapter 22 is arranged relatively in the front-to-back direction) of the front end plate 213 and the rear end plate 214. For example, the adapter 22 is only arranged on the front end plate 213 or the rear end plate 214, or, one adapter 22 is respectively arranged on the front end plate 213 and the rear end plate 214. It can be understood that the conventional battery pack is usually a rectangular structure, and in order to increase the effective cooling process length, the cooling flow channel in the liquid cooling plate 4 is usually arranged along the length direction of the box body, and the liquid inlet nozzle and the liquid outlet nozzle are opposite to the front end plate 213 (rear end plate 214) of the box body. By arranging the adapter 22 on the front end plate 213 or the rear end plate 214, the nearby connection with the nozzle of the liquid cooling plate 4 can be satisfied, further reducing the arrangement of the pipe branches in the battery box body, which is conducive to improving the space utilization of the battery box body.

[0049] like Figure 1 and Figure 2 As shown, a battery pack of another embodiment of the present invention comprises: a battery box, a battery cell 5 and a liquid cooling plate 4. The battery box is the battery box of the present invention, the battery cell 5 is arranged in the battery box, and the liquid cooling plate 4 is arranged in the battery box. In other examples, the liquid cooling plate 4 can also be formed in the bottom plate 1.

[0050] According to the battery pack of the embodiment of the utility model, since the adapter part 22 is arranged on one side of the thickness direction of the side plate 21, and the liquid inlet main channel 225, the liquid outlet main channel 226, the liquid outlet 222 and the liquid inlet 221 are arranged on the adapter part 22 to reduce the number of flow channels opened on the side plate 21, the structural strength and support stability of the side plate 21 can be ensured. And because the liquid inlet 221 is connected to the liquid inlet nozzle of the liquid cooling plate 4, and the liquid outlet 222 is connected to the liquid outlet nozzle of the liquid cooling plate 4, the side plate 21 is provided with a liquid inlet channel 211 and a liquid outlet channel 212 for communicating with the outside world, the liquid inlet channel 211 is connected to the liquid inlet main channel 225, and the liquid outlet channel 212 is connected to the liquid outlet main channel 226, so the main supply and return pipeline of the outside world can be connected to the liquid inlet channel 211 and the liquid outlet channel 212, and then transported to the liquid cooling plate 4 through the adapter 22, thereby eliminating the complex supply and return branch pipes in the related technology, which is conducive to improving the space utilization of the battery box. Therefore, the battery pack of the embodiment of the utility model can not only improve the space utilization of the battery box, but also ensure the structural strength of the battery box, which is conducive to extending the service life of the battery box.

[0051] Alternatively, if Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, the liquid cooling plate 4 includes a top plate liquid cooling plate 41, a battery cell liquid cooling plate 42 and a bottom plate liquid cooling plate 43. The top plate liquid cooling plate 41 is arranged on the top surface of the battery cell 5, the battery cell liquid cooling plate 42 is arranged on the bottom surface of the battery cell 5 and / or the side surface of the battery cell 5, and the bottom plate liquid cooling plate 43 is formed in the bottom plate 1. In other words, in addition to the conventional top plate liquid cooling plate 41 and the battery cell liquid cooling plate 42, the present application also constructs the bottom plate 1 into a liquid cooling plate 4, thereby further improving the cooling effect. Specifically, the top plate liquid cooling plate 41 is connected to the first liquid inlet 2211 and the first liquid outlet 2221 on the upper end surface 223 of the adapter 22, the bottom plate liquid cooling plate 43 is connected to the second liquid inlet 2212 and the second liquid outlet 2222 on the lower end surface 224 of the adapter 22, and the battery cell liquid cooling plate 42 is connected to the third liquid inlet 2213 and the third liquid outlet 2223 on the inner side surface of the adapter 22.

[0052] In some embodiments, Figure 7 and Figure 8 As shown, the top plate liquid cooling plate 41 has a first water nozzle 411 plugged into the adapter 22, and a first sealing layer 31 is provided between the outer peripheral surface of the first water nozzle 411 and the adapter 22 and between the contact surface of the top plate liquid cooling plate 41 and the adapter 22. In other words, there are two first water nozzles 411, one first water nozzle 411 is plugged into the first liquid inlet 2211, and the other first water nozzle 411 is plugged into the first liquid outlet 2221, so that the coolant in the top plate liquid cooling plate 41 can circulate through the two first water nozzles 411. Among them, the first sealing layer 31 can be a sealant structure or an injection molded EPDM sealing structure. For example, injection-molded EPDM seals are used between the outer circumferential surface of the first water nozzle 411 and the inner circumferential surfaces of the first liquid inlet 2211 and the first liquid outlet 2221, and a sealant structure is used between the contact surface between the lower surface of the top plate liquid cooling plate 41 and the upper end surface 223 of the adapter 22, thereby improving the sealing effect between the top plate liquid cooling plate 41 and the adapter 22.

[0053] Alternatively, if Figure 7 and Figure 8As shown, the bottom plate liquid cooling plate 43 has a second water nozzle 431 plugged into the adapter 22, and a second sealing layer 32 is provided between the outer peripheral surface of the second water nozzle 431 and the adapter 22 and between the contact surface of the bottom plate liquid cooling plate 43 and the adapter 22. In other words, there are two second water nozzles 431, one second water nozzle 431 is plugged into the second liquid inlet 2212, and the other second water nozzle 431 is plugged into the second liquid outlet 2222, so that the coolant in the bottom plate liquid cooling plate 43 can circulate through the two second water nozzles 431. Among them, the second sealing layer 32 can be a sealant structure or an injection molded EPDM sealing structure. For example, injection-molded EPDM seals are used between the outer circumferential surface of the second water nozzle 431 and the inner circumferential surfaces of the second liquid inlet 2212 and the second liquid outlet 2222, and a sealant structure is used between the contact surface between the upper surface of the bottom plate liquid cooling plate 43 and the lower end surface 224 of the adapter 22, thereby improving the sealing effect between the bottom plate liquid cooling plate 43 and the adapter 22.

[0054] Alternatively, if Figure 7 As shown, the battery cell liquid cooling plate 42 has a water diversion branch pipe 421, and a third sealing layer 33 is provided between the outer peripheral surface of the water diversion branch pipe 421 and the adapter 22. In other words, there are two water diversion branch pipes 421, one water diversion branch pipe 421 is plugged into the third liquid inlet 2213, and the other water diversion branch pipe 421 is plugged into the third liquid outlet 2223, so that the coolant in the battery cell liquid cooling plate 42 can circulate through the two water diversion branch pipes 421. Among them, the third sealing layer 33 can be a sealant structure or an injection molded EPDM sealing structure. For example, the outer peripheral surface of the water diversion branch pipe 421 and the inner peripheral surface of the third liquid inlet 2213 and the third liquid outlet 2223 are both sealed with injection molded EPDM, and the outer flange 4211 of the water diversion branch pipe 421 and the contact surface of the inner side surface of the adapter 22 are sealed with a sealant structure, thereby improving the sealing effect between the battery cell liquid cooling plate 42 and the adapter 22.

[0055] A vehicle according to another embodiment of the present invention comprises a battery pack according to an embodiment of the present invention. The technical advantages of the vehicle according to the embodiment of the present invention are the same as those of the battery pack according to the above embodiment, and will not be described in detail here.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axis", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0057] In addition, 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. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A battery box, characterized in that: include: Bottom plate (1); The outer peripheral plate (2) is arranged around the circumference of the bottom plate (1), and the outer peripheral plate (2) comprises a side plate (21) and a transition portion (22). The transition portion (22) is arranged on one side of the side plate (21) along the thickness direction of the side plate (21), and the transition portion (22) has a liquid inlet main channel (225), a liquid outlet main channel (226), a liquid outlet (222) and a liquid inlet (221), and the liquid outlet (222) and the liquid inlet (221) are respectively connected to the liquid outlet (222) and the liquid outlet (221) A liquid outlet main channel (226) and the liquid inlet main channel (225), the liquid inlet port (221) is used to be connected to the liquid inlet nozzle of the liquid cooling plate (4), the liquid outlet port (222) is used to be connected to the liquid outlet nozzle of the liquid cooling plate (4), the side plate (21) is provided with a liquid inlet channel (211) and a liquid outlet channel (212) for communicating with the outside, the liquid inlet channel (211) is connected to the liquid inlet main channel (225), and the liquid outlet channel (212) is connected to the liquid outlet main channel (226).

2. The battery box according to claim 1, characterized in that: The liquid inlet (221) comprises a first liquid inlet (2211) and a second liquid inlet (2212); the liquid outlet (222) comprises a first liquid outlet (2221) and a second liquid outlet (2222); the adapter (22) comprises an upper end surface (223) and a lower end surface (224) which are opposite to each other in a first direction, wherein the first direction is a height direction of the battery case; the first liquid outlet (2221) and the first liquid inlet (2211) are located on the upper end surface (223); and the second liquid outlet (2222) and the second liquid inlet (2212) are located on the lower end surface (224).

3. The battery box according to claim 2, characterized in that: In the first direction, the upper end surface (223) and the lower end surface (224) are respectively flush with the end surfaces on both sides of the side plate (21).

4. The battery box according to claim 2, characterized in that: The liquid inlet (221) further comprises a third liquid inlet (2213), and the liquid outlet (222) further comprises a third liquid outlet (2223), and the third liquid inlet (2213) and the third liquid outlet (2223) are located on the inner side surface of the adapter portion (22).

5. The battery box according to claim 1, characterized in that: The transition portion (22) and the side plate (21) are integrally die-cast.

6. The battery box according to claim 1, characterized in that: The side plate (21) comprises a front end plate (213) and a rear end plate (214), wherein the front end plate (213) and the rear end plate (214) are arranged relative to each other along the length direction of the bottom plate (1), and the transition portion (22) is provided on at least one of the front end plate (213) and the rear end plate (214).

7. A battery pack, characterized in that: include: A battery box, wherein the battery box is the battery box according to any one of claims 1 to 6; A battery cell (5), wherein the battery cell (5) is arranged in the battery box; A liquid cooling plate (4), the liquid cooling plate (4) is arranged in the battery box, and / or the liquid cooling plate (4) is formed in the bottom plate (1).

8. The battery pack according to claim 7, characterized in that: The liquid cooling plate (4) comprises a top plate liquid cooling plate (41), a battery cell liquid cooling plate (42) and a bottom plate liquid cooling plate (43); the top plate liquid cooling plate (41) is arranged on the top surface of the battery cell (5); the battery cell liquid cooling plate (42) is arranged on the bottom surface of the battery cell (5) and / or on the side surface of the battery cell (5); and the bottom plate liquid cooling plate (43) is formed in the bottom plate (1).

9. The battery pack according to claim 8, characterized in that: The top plate liquid cooling plate (41) has a first water nozzle (411) plugged into the adapter part (22), and a first sealing layer (31) is provided between the outer peripheral surface of the first water nozzle (411) and the adapter part (22) and between the contact surface between the top plate liquid cooling plate (41) and the adapter part (22); And / or, the bottom plate liquid cooling plate (43) has a second water nozzle (431) plugged into the adapter part (22), and a second sealing layer (32) is provided between the outer peripheral surface of the second water nozzle (431) and the adapter part (22) and between the contact surface between the bottom plate liquid cooling plate (43) and the adapter part (22); And / or, the battery cell liquid cooling plate (42) has a water inlet branch pipe (421), and a third sealing layer (33) is provided between the outer peripheral surface of the water inlet branch pipe (421) and the transition portion (22).

10. A vehicle, characterized in that: A battery pack comprising any one of claims 7-9.

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