CN219350407U - Battery box heat exchange plate and battery box heat exchange system - Google Patents

Abstract

The utility model provides a battery box heat exchange plate and a battery box heat exchange system, and relates to the technical field of batteries. The battery box heat exchange plate is provided with a first heat exchange medium inlet, a first heat exchange medium outlet, a first runner and a first heat exchange area which are connected in sequence, and a second heat exchange medium inlet, a second heat exchange medium outlet, a second runner and a second heat exchange area which are connected in sequence, wherein the first runner and the second runner are positioned on two opposite sides of the battery box heat exchange plate. The first flow channel and the second flow channel are arranged on the battery box heat exchange plate, and the first flow channel and the second flow channel extend in a winding and diverging mode in the direction of the inner side towards the outer side, so that a heat dissipation medium firstly enters the central area of the battery box heat exchange plate and exchanges heat with the central part of the battery module corresponding to the central area, and the battery module is obviously and effectively cooled and dissipated, and the purpose of improving the heat exchange efficiency of the battery box is achieved.

Description

Battery box heat exchange plate and battery box heat exchange system

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery box heat exchange plate and a battery box heat exchange system.

Background

Under the condition that the battery pack is in a discharging state, the battery cells arranged on the upper layer of the bottom plate start to generate heat, and the heat dissipation environments of the battery cells are different due to the difference of the arrangement positions of the battery cells. The periphery of the outermost layer battery core is open, the heat dissipation space is large, heat generated by the battery core can be transferred to the case cover through air to dissipate heat, and the battery core in the center of the arrangement area is poor in heat dissipation environment because the battery core is fully distributed around, and heat generated by the battery core cannot be transferred. Over time, the temperature of the middle part of the battery cells is high, and the temperature of the surrounding battery cells is low.

However, the battery pack in the related art generally adopts an S-shaped liquid cooling water channel, the cooling liquid flows from one side of the bottom plate of the battery pack to the other side, and the cooling liquid needs to flow through a large half of cooling area to cool the battery core with relatively high middle temperature, so that the battery pack cannot be cooled in a high-temperature area quickly, and the overall cooling effect of the battery pack is affected to a certain extent.

Disclosure of Invention

The utility model aims to provide a battery box heat exchange plate and a battery box heat exchange system, which can effectively and remarkably exchange heat for a battery module.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a battery box heat exchange plate having:

a first heat exchange medium inlet and a second heat exchange medium inlet for conveying heat exchange medium;

a first heat exchange medium outlet and a second heat exchange medium outlet for outputting heat exchange medium;

a first flow passage communicating the first heat exchange medium inlet and the first heat exchange medium outlet;

a second flow passage communicating the second heat exchange medium inlet and the second heat exchange medium outlet;

the first flow channel and the second flow channel are positioned on two opposite sides of the battery box heat exchange plate;

the first flow channel flows through a first heat exchange area from the first heat exchange medium inlet, and outwards meanders and divergently extends to the first heat exchange medium outlet from the side close to the second flow channel in the first heat exchange area, wherein the first heat exchange area is used for exchanging heat to the battery module;

the second flow channel flows through a second heat exchange area from the second heat exchange medium inlet, and outwards meanders and divergently extends to the second heat exchange medium outlet from the side close to the first flow channel in the second heat exchange area, wherein the second heat exchange area is used for exchanging heat with the battery module.

In an alternative embodiment, both the first and second flow channels extend in a serpentine, divergent shape.

In an alternative embodiment, the battery box heat exchange plate further comprises a first one-way valve and a second one-way valve, wherein the first one-way valve is arranged in the first flow channel, and the second one-way valve is arranged in the second flow channel.

In an alternative embodiment, the battery box heat exchange plate further comprises a first four-way valve and a second four-way valve, wherein the first four-way valve is arranged in the first flow channel, and the second four-way valve is arranged in the second flow channel;

the first one-way valve and the first four-way valve are used for switching the flow direction of the first flow channel together, and the second one-way valve and the second four-way valve are used for switching the flow direction of the second flow channel together.

In a second aspect, the present utility model provides a heat exchange system of a battery box, including a heat exchange plate of a battery box and a battery module according to any one of the foregoing embodiments, where the battery module is disposed in the first heat exchange area and the second heat exchange area, and the heat exchange plate of the battery box is used for exchanging heat with the battery module.

In an alternative embodiment, the heat exchange system of the battery box comprises a first water inlet pipeline and a first water outlet pipeline, the first water inlet pipeline is connected with one end of the first flow channel close to the second heat exchange area, the first water outlet pipeline is connected with one end of the first flow channel far away from the second heat exchange area, and the first heat exchange medium inlet, the first water inlet pipeline, the first flow channel, the first water outlet pipeline and the first heat exchange medium outlet are sequentially connected and form a first heat dissipation flow channel;

the battery box heat exchange system comprises a second water inlet pipeline and a second water outlet pipeline, the second water inlet pipeline is connected with one end, close to the first heat exchange area, of the second flow channel, the second water outlet pipeline is connected with one end, far away from the first heat exchange area, of the second flow channel, and the second heat exchange medium inlet, the second water inlet pipeline, the second flow channel, the second water outlet pipeline and the second heat exchange medium outlet are sequentially connected and form a second heat dissipation flow channel.

In an alternative embodiment, the first water inlet pipeline and the first water outlet pipeline are provided with first check valves; the second water inlet pipeline and the second water outlet pipeline are both provided with second check valves.

In an alternative embodiment, the heat exchange system of the battery box further comprises a third water inlet pipeline and a third water outlet pipeline, the third water inlet pipeline is connected with one end of the first flow channel far away from the second heat exchange area, the third water outlet pipeline is connected with one end of the first flow channel near the second heat exchange area, and the first heat exchange medium inlet, the third water inlet pipeline, the first flow channel, the third water outlet pipeline and the first heat exchange medium outlet are sequentially connected and form a first heating flow channel;

the battery box heat exchange system further comprises a fourth water inlet pipeline and a fourth water outlet pipeline, the fourth water inlet pipeline is connected with one end, far away from the first heat exchange area, of the second flow channel, the fourth water outlet pipeline is connected with one end, close to the first heat exchange area, of the second flow channel, and the second heat exchange medium inlet, the fourth water inlet pipeline, the second flow channel, the fourth water outlet pipeline and the second heat exchange medium outlet are sequentially connected to form a second heating flow channel;

the first heat dissipation flow channel is selectively communicated with the first heating flow channel, and the second heat dissipation flow channel is selectively communicated with the second heating flow channel.

In an alternative embodiment, the third water inlet pipeline and the third water outlet pipeline are arranged in a crossing way, and a first four-way valve is arranged at the crossing part of the third water inlet pipeline and the third water outlet pipeline;

the fourth water inlet pipeline and the fourth water outlet pipeline are arranged in a crossing mode, and a second four-way valve is arranged at the crossing position of the fourth water inlet pipeline and the fourth water outlet pipeline.

In an optional embodiment, the first four-way valve includes two first pipes, the two first pipes are non-coplanar and have a height difference and are in a cross-shaped state, and the two first pipes are respectively communicated with the third water inlet pipeline and the third water outlet pipeline;

the second four-way valve comprises two second pipelines, wherein the two second pipelines are non-coplanar and have height differences and are in a cross state, and the two second pipelines are respectively communicated with the fourth water inlet pipeline and the fourth water outlet pipeline.

The battery box heat exchange plate and the battery box heat exchange system provided by the embodiment of the utility model have the beneficial effects that: the first flow channel and the second flow channel are arranged on the battery box heat exchange plate, and the first flow channel and the second flow channel extend in a winding and diverging mode in the direction of the inner side towards the outer side, so that a heat dissipation medium firstly enters the central area of the battery box heat exchange plate and exchanges heat with the central part of the battery module corresponding to the central area, and the battery module is obviously and effectively cooled and dissipated, and the purpose of improving the heat exchange efficiency of the battery box is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a heat exchange plate of a battery box body provided by an embodiment of the utility model;

FIG. 2 is an enlarged view of portion A of FIG. 1 according to an embodiment of the present utility model;

fig. 3 is a schematic view of a portion of a heat exchange plate of a battery box according to an embodiment of the present utility model.

Icon: 10-a battery box heat exchange plate; 110-a first heat exchange medium inlet; 120-a first heat exchange medium outlet; 130-a first flow channel; 131-a first branch flow passage; 132—a first connecting channel; 140-a first heat exchange zone; 150-a first water inlet pipeline; 160-a first water outlet line; 170-a third water inlet pipeline; 180-a third water outlet pipeline; 191-a first one-way valve; 192-a first four-way valve; 210-a second heat exchange medium inlet; 220-a second heat exchange medium outlet; 230-a second flow path; 231-a second branch flow passage; 232-a second connecting runner; 240-a second heat exchange zone; 250-a second water inlet pipeline; 260-a second water outlet line; 270-fourth water inlet pipeline; 280-a fourth water outlet pipeline; 291-second check valve; 292-a second four-way valve; 300-central region.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The battery pack in the related art is provided with a water cooling system. The water cooling mode of the battery pack is bottom heat dissipation, namely a water channel is designed in the battery pack bottom plate, the battery pack bottom plate is divided into an upper part and a lower part, the upper surface is provided with a battery cell arrangement area, a water inlet and a water outlet, the lower surface of the bottom plate is provided with an S-shaped water channel, and the upper layer and the lower layer are connected in a tailor-welded mode. When the battery works, the external cooling equipment inputs cold water into the S-shaped water channel in the bottom plate from the water inlet, heat generated by the battery works is taken away through water flow, cooled warm water is output to the cooling equipment through the water outlet for continuous cooling, and thus a cooling circulation process is completed. The heating process is similar, and will not be described again here.

When the battery is in a discharging state, the battery cells arranged on the upper layer of the bottom plate start to generate heat, and the heat dissipation environments of the battery cells are different due to the difference of the arrangement positions of the battery cells. The periphery of the outermost layer battery core is open, the heat dissipation space is large, heat generated by the battery core can be transferred to the case cover through air to dissipate heat, and the battery core in the center of the arrangement area is poor in heat dissipation environment because the battery core is fully distributed around, and heat generated by the battery core cannot be transferred. Over time, the temperature of the middle part of the battery cells is high, and the temperature of the surrounding battery cells is low.

The battery pack adopting the S-shaped liquid cooling water channel has the advantages that cold water passes through the water inlet of the bottom plate and needs to flow through a large half cooling area to cool the battery cell with relatively high middle temperature, and the disadvantage of the heat conduction mode is that the battery cell cannot be cooled rapidly for a high temperature area, and the temperature of the battery cell is high or low in the S-shaped area through which the cold water passes, so that the whole cooling effect is also affected to a certain extent.

When the battery is in a low-temperature state, the periphery of the outermost layer of the battery core is clear, the heat preservation effect is poor, the temperature of the battery core is greatly influenced by the surrounding environment, and the battery core in the center of the arrangement area is good in heat preservation effect because the battery core is fully distributed around. Therefore, the phenomenon that the temperature of the middle part of the battery cells is high and the temperature of the surrounding battery cells is low can occur under the low temperature condition. The standard battery pack adopting the S-shaped liquid hot water channel has the advantages that hot water flows through the water inlet of the bottom plate and needs to flow through the whole heating area to heat the battery cell with relatively low temperature on the right side, and the temperature of the battery cell is high or low in the S-shaped area through which the hot water passes, so that the whole cooling effect is also affected to a certain extent.

Based on the problems, the utility model provides a heat exchange system of a battery box, which can effectively improve the heat exchange effect.

Referring to fig. 1 to 3, the battery box heat exchange system includes a battery box heat exchange plate 10 and a battery module (not shown), where the battery box heat exchange plate 10 is used for exchanging heat with the battery module, so as to achieve the purpose of heat dissipation or heating of the battery module.

The battery box heat exchange plate 10 is provided with a first heat exchange medium inlet 110, a first heat exchange medium outlet 120, a first flow channel 130 and a first heat exchange area 140, and likewise, the battery box heat exchange plate 10 is also provided with a second heat exchange medium inlet 210, a second heat exchange medium outlet 220, a second flow channel 230 and a second heat exchange area 240, wherein the first flow channel 130 and the second flow channel 230 are located on opposite sides of the battery box heat exchange plate 10. The battery module is placed in the first heat exchange region 140 and the second heat exchange region 240.

In the present embodiment, the description about the first heat exchange region 140 is as follows:

the first heat exchange area 140 is used for exchanging heat to the battery module, two ends of the first flow channel 130 are respectively communicated with the first heat exchange medium inlet 110 and the first heat exchange medium outlet 120, and the first flow channel 130 flows through the first heat exchange area 140 from the first heat exchange medium inlet 110 and extends to the first heat exchange medium outlet 120 in a meandering and divergent manner from the side close to the second flow channel 230 in the first heat exchange area 140; the first heat exchange medium inlet 110 is used for conveying the heat exchange medium to the first flow channel 130, and the first heat exchange medium outlet 120 is used for outputting the heat exchange medium of the first flow channel 130, so that heat exchange between the first heat exchange area 140 and the heat exchange medium flowing through the first flow channel 130 is realized.

In the present embodiment, the description about the second heat exchange region 240 is as follows:

the second heat exchange area 240 is used for exchanging heat to the battery module, two ends of the second flow channel 230 are respectively communicated with the second heat exchange medium inlet 210 and the second heat exchange medium outlet 220, and the second flow channel 230 flows through the second heat exchange area 240 from the second heat exchange medium inlet 210, and extends to the second heat exchange medium outlet 220 from the side close to the first flow channel 130 in a meandering and divergent manner; the second heat exchange medium inlet 210 is used for conveying the heat exchange medium to the second flow channel 230, and the second heat exchange medium outlet 220 is used for outputting the heat exchange medium of the second flow channel 230, so that the heat exchange between the second heat exchange area 240 and the heat exchange medium flowing through the second flow channel 230 is realized.

It should be noted that, since the first flow channel 130 and the second flow channel 230 extend in a meandering and divergent manner on the battery box heat exchange plate 10 in a direction from the inner side to the outer side, in other words, the first flow channel 130 and the second flow channel 230 extend toward the outer periphery in the central region 300 on the battery box heat exchange plate 10, so that the heat dissipation medium first enters the central region 300 and exchanges heat with the central portion of the battery module corresponding to the central region 300, and further obviously and effectively cools and dissipates heat of the battery module, thereby achieving the purpose of improving the heat exchange efficiency of the battery box.

It is understood that the central region 300 on the battery case heat exchange plate 10 corresponds to the middle of the battery module, and the central region 300 corresponds to the middle regions of the two sides adjacent to the first and second heat exchange regions 140 and 240, and the central region 300 is shown as a dotted line region in fig. 2.

In addition, the heat exchange medium may be a high-temperature liquid for heating or a cooling liquid for cooling, and may be adjusted according to the actual situation, and is not particularly limited herein.

In order to enable the battery box heat exchange plate 10 to exchange heat uniformly to the battery module, the first heat exchange area 140 and the second heat exchange area 240 are symmetrically arranged, so that the first heat exchange area 140 and the second heat exchange area 240 exchange heat to the battery module at the same time under the condition that the battery module is placed in the first heat exchange area 140 and the second heat exchange area 240. Moreover, the heat exchange area of the battery module is divided into the first heat exchange area 140 and the second heat exchange area 240 which are symmetrical, so that the battery module corresponding to the central area 300 can be conveniently and preferentially exchanged, and the working efficiency of the battery box thermal management system can be improved.

In this embodiment, because the temperature of the central region 300 corresponding to the middle region of the battery module is higher, when the battery module dissipates heat, the heat exchange medium flows from the high-temperature central region 300 corresponding to the battery module to the low-temperature side peripheral region through the first flow channel 130 and the second flow channel 230, which is beneficial to the temperature balance of the whole battery module, thereby improving the heat exchange efficiency.

In this embodiment, the first flow channel 130 and the second flow channel 230 each extend in a C-shaped serpentine divergent shape.

The first flow channel 130 includes a plurality of first branch flow channels 131 and a plurality of first connecting flow channels 132, the plurality of first branch flow channels 131 are sequentially arranged from one side of the first heat exchange area 140, which is close to the second heat exchange area 240, towards a direction away from the second heat exchange area 240, and the first branch flow channel 131, which is far from the inner side of the first heat exchange area 140, of the two adjacent first branch flow channels 131 is wound around the first branch flow channel 131, which is close to the inner side of the first heat exchange area 140, and the two adjacent first branch flow channels 131 are connected through the first connecting flow channel 132.

Specifically, the plurality of first branch flow passages 131 are all C-shaped, and the C-shaped openings of the plurality of first branch flow passages 131 face the second heat exchange area 240, and the lengths of the plurality of first branch flow passages 131 gradually increase from one side of the first heat exchange area 140, which is close to the second heat exchange area 240, toward a direction away from the second heat exchange area 240, so as to improve the heat dissipation effect.

Similarly, the second flow path 230 includes a plurality of second branch flow paths 231 and a plurality of second connecting flow paths 232, the plurality of second branch flow paths 231 are sequentially disposed from one side of the second heat exchange region 240 near the first heat exchange region 140 toward a direction away from the first heat exchange region 140, and the second branch flow paths 231 far from the inner side of the second heat exchange region 240 of the adjacent two second branch flow paths 231 are wound around the second branch flow paths 231 near the inner side of the second heat exchange region 240, and the adjacent two second branch flow paths 231 are connected through the second connecting flow paths 232.

Specifically, the plurality of second branch flow passages 231 are C-shaped, and the C-shaped openings of the plurality of second branch flow passages 231 face the first heat exchange area 140, and the lengths of the plurality of second branch flow passages 231 gradually increase from the side of the second heat exchange area 240, which is close to the first heat exchange area 140, toward the direction away from the first heat exchange area 140, so as to improve the heat dissipation effect.

Referring to fig. 3, the heat exchange system of the battery box is provided with a first water inlet pipeline 150, a first water outlet pipeline 160, a third water inlet pipeline 170 and a third water outlet pipeline 180 corresponding to the first heat exchange area 140; of course, the heat exchange system of the battery box is further provided with a second water inlet pipeline 250, a second water outlet pipeline 260, a fourth water inlet pipeline 270 and a fourth water outlet pipeline 280 corresponding to the second heat exchange area 240, and the specific arrangement of the above pipelines is described in detail below.

The arrangement of the piping corresponding to the first heat exchange area 140 is as follows:

the first water inlet pipeline 150 is connected with one end of the first flow channel 130 close to the second heat exchange area 240, the first water outlet pipeline 160 is connected with one end of the first flow channel 130 far away from the second heat exchange area 240, and the first heat exchange medium inlet 110, the first water inlet pipeline 150, the first flow channel 130, the first water outlet pipeline 160 and the first heat exchange medium outlet 120 are sequentially connected and form a first heat dissipation flow channel.

In the present embodiment, the first heat exchange medium inlet 110 is connected to the first water inlet pipe 150 to deliver the heat exchange medium to the first flow channel 130 through the first water inlet pipe 150, and the first heat exchange medium outlet 120 is connected to the first water outlet pipe 160 to output the heat exchange medium flowing out of the first flow channel 130 through the first water outlet pipe 160.

Since the first water inlet pipe 150 is connected to one end of the first flow passage 130 near the central region 300 and the first water outlet pipe 160 is connected to the other end of the first flow passage far from the central region 300, it is achieved that the heat exchange medium is inputted from the first heat exchange medium inlet 110 and flows along the first flow passage 130 from the central region 300 of the first heat exchange region 140 toward a direction far from the second heat exchange region 240.

In the above-mentioned case, the heat exchange medium is typically a cooling liquid, and the cooling liquid flows along the first heat dissipation flow channel, so that the cooling liquid flows from the central region 300 to the periphery of the first heat exchange region 140 away from the second heat exchange region 240, so that the cooling liquid exchanges heat with the central region 300 with the highest temperature of the battery module first, and further, heat dissipation of the battery module is effectively and significantly achieved.

It can be seen that the cooling fluid sequentially flows through the first heat exchange medium inlet 110, the first water inlet pipe 150, the first flow channel 130, the first water outlet pipe 160 and the first heat exchange medium outlet 120, that is, the cooling fluid flows through the first heat dissipation flow channel formed by the above pipes, thereby achieving heat dissipation of the battery module.

In addition, the third water inlet pipeline 170 is connected to an end of the first flow channel 130 away from the second heat exchange area 240, the third water outlet pipeline 180 is connected to an end of the first flow channel 130 near the second heat exchange area 240, and the first heat exchange medium inlet 110, the third water inlet pipeline 170, the first flow channel 130, the third water outlet pipeline 180 and the first heat exchange medium outlet 120 are sequentially connected to form a first heating flow channel.

In the present embodiment, the first heat exchange medium inlet 110 is connected to the third water inlet pipe 170 to deliver the heat exchange medium to the first flow passage 130 through the third water inlet pipe 170, and the first heat exchange medium outlet 120 is connected to the third water outlet pipe 180 to output the heat exchange medium flowing out of the first flow passage 130 through the third water outlet pipe 180.

Since the third water inlet pipe 170 is connected to one end of the first flow path 130 distant from the central region 300, and the third water outlet pipe 180 is connected to the other end of the first flow path 130 close to the central region 300, it is achieved that the heat exchange medium is inputted from the first heat exchange medium inlet 110 and flows along the first flow path 130 from the first heat exchange region 140 toward the central region 300 close to the second heat exchange region 240.

In the above-mentioned case, the heat exchange medium is typically a heating liquid, and the heating liquid flows along the first heating flow channel, so that the heating liquid flows from the periphery of the battery module to the direction in which the first heat exchange area 140 is close to the center of the second heat exchange area 240, so that the heating liquid exchanges heat with the side periphery of the battery module with the lowest temperature first, and thus the battery module is effectively and significantly heated.

Therefore, the heating liquid sequentially flows through the first heat exchange medium inlet 110, the third water inlet pipeline 170, the first flow channel 130 and the third water outlet pipeline 180, that is, the heating liquid flows through the first heating flow channel formed by the pipelines, and the flow direction of the first heating flow channel is opposite to that of the first heat dissipation flow channel, so that the battery module is heated.

In order to realize the working condition conversion of the first heat dissipation flow channel and the first heating flow channel, in other words, in the case of not changing the first heat exchange medium inlet 110 and the first heat exchange medium outlet 120, in order to realize only changing the flow direction of the heat exchange medium in the pipeline, a first check valve 191 may be disposed in each of the first water inlet pipeline 150 and the first water outlet pipeline 160; and the third water inlet pipeline 170 and the third water outlet pipeline 180 are arranged in a crossing way, and a first four-way valve 192 is arranged at the crossing part of the third water inlet pipeline 170 and the third water outlet pipeline 180.

In this embodiment, the first heat dissipation flow channel is communicated by opening the first check valve 191 disposed on the first water inlet pipeline 150 and the first water outlet pipeline 160 and closing the first four-way valve 192 disposed on the third water inlet pipeline 170 and the third water outlet pipeline 180; the first four-way valve 192 arranged on the third water inlet pipeline 170 and the third water outlet pipeline 180 is opened, and the first one-way valve 191 arranged on the first water inlet pipeline 150 and the first water outlet pipeline 160 is closed, so that the first heating flow passage is communicated, and the first heat dissipation flow passage and the first heating flow passage are alternatively communicated, so that the flow direction of heat exchange medium in the first flow passage 130 is changed under the condition that the first heat exchange medium inlet 110 and the first heat exchange medium outlet 120 are not changed, different working conditions of the battery module are adapted, and the adaptability of the battery box heat exchange plate 10 is improved.

It should be noted that, the first four-way valve 192 adopts a special design, and the cross pipes in the ball valve of the first four-way valve 192 are non-coplanar, and the upper and lower pipes have a height difference. In other words, the first four-way valve 192 includes two first pipes (not shown) that are non-coplanar and have a height difference and are in a cross-like state, and the two first pipes are respectively connected to the third water inlet pipeline 170 and the third water outlet pipeline 180.

The plumbing corresponding to the second heat exchange region 240 is provided as follows:

the second water inlet pipeline 250 is connected to one end of the second flow channel 230 near the first heat exchange area 140, the second water outlet pipeline 260 is connected to one end of the second flow channel 230 far away from the first heat exchange area 140, and the second heat exchange medium inlet 210, the second water inlet pipeline 250, the second flow channel 230, the second water outlet pipeline 260 and the second heat exchange medium outlet 220 are sequentially connected to form a second heat dissipation flow channel.

In the present embodiment, the second heat exchange medium inlet 210 is connected to the second water inlet pipe 250 to deliver the heat exchange medium to the second flow path 230 through the first water inlet pipe 150, and the second heat exchange medium outlet 220 is connected to the second water outlet pipe 260 to output the heat exchange medium flowing out of the second flow path 230 through the second water outlet pipe 260.

Since the second water inlet pipe 250 is connected to one end of the second flow path 230 near the central region 300 and the second water outlet pipe 260 is connected to the other end of the second flow path 230 far from the central region 300, it is achieved that the heat exchange medium is inputted from the second heat exchange medium inlet 210 and flows along the second flow path 230 from the central region 300 of the second heat exchange region 240 toward a direction far from the first heat exchange region 140.

In the above-mentioned case, the heat exchange medium is usually a cooling liquid, and the cooling liquid flows along the second heat dissipation flow channel, so that the cooling liquid flows from the central area 300 to the periphery of the second heat exchange area 240 away from the first heat exchange area 140, so that the cooling liquid exchanges heat with the middle part with the highest temperature of the battery module first, and further, heat dissipation of the battery module is effectively and significantly achieved.

Therefore, the cooling fluid sequentially flows through the second heat exchange medium inlet 210, the second water inlet pipeline 250, the second flow channel 230, the second water outlet pipeline 260 and the second heat exchange medium outlet 220, that is, the cooling fluid flows through the second heat dissipation flow channel formed by the above pipelines, so that heat dissipation of the battery module is realized.

In addition, the fourth water inlet pipeline 270 is connected to an end of the second flow channel 230 away from the first heat exchange area 140, the fourth water outlet pipeline 280 is connected to an end of the second flow channel 230 near the first heat exchange area 140, and the second heat exchange medium inlet 210, the fourth water inlet pipeline 270, the second flow channel 230, the fourth water outlet pipeline 280 and the second heat exchange medium outlet 220 are sequentially connected to form a second heating flow channel.

In the present embodiment, the second heat exchange medium inlet 210 is connected to the fourth water inlet pipe 270 to deliver the heat exchange medium to the second flow path 230 through the fourth water inlet pipe 270, and the second heat exchange medium outlet 220 is connected to the fourth water outlet pipe 280 to output the heat exchange medium flowing out of the second flow path 230 through the fourth water outlet pipe 280.

Since the fourth water inlet pipe 270 is connected to one end of the second flow path 230 remote from the central region 300 and the fourth water outlet pipe 280 is connected to the other end of the second flow path 230 near the central region 300, it is achieved that the heat exchange medium is inputted from the second heat exchange medium inlet 210 and flows along the second flow path 230 from the second heat exchange region 240 toward the central region 300 near the first heat exchange region 140.

In the above-mentioned case, the heat exchange medium is typically a heating liquid, and the heating liquid flows along the first heating flow channel, so that the heating liquid flows from the periphery of the battery module to the second heat exchange area 240 near the center of the first heat exchange area 140, so that the heating liquid exchanges heat with the side periphery of the battery module with the lowest temperature first, and further, the heat exchange of the battery module is effectively and significantly achieved.

Therefore, the heating liquid sequentially flows through the second heat exchange medium inlet 210, the fourth water inlet pipeline 270, the second flow channel 230, the fourth water outlet pipeline 280 and the second heat exchange medium outlet 220, that is, the heating liquid flows through the second heating flow channel formed by the above pipelines, and the flow direction of the second heating flow channel is opposite to that of the second heat dissipation flow channel, so that the battery module is heated.

In order to realize the working condition conversion of the second heat dissipation flow channel and the second heating flow channel, in other words, in the case of not changing the second heat exchange medium inlet 210 and the second heat exchange medium outlet 220, in order to realize only changing the flow direction of the heat exchange medium in the pipeline, a second check valve 291 may be disposed in each of the second water inlet pipeline 250 and the second water outlet pipeline 260; and the fourth water inlet pipeline 270 and the fourth water outlet pipeline 280 are arranged in a crossing manner, and a second four-way valve 292 is arranged at the crossing position of the fourth water inlet pipeline 270 and the fourth water outlet pipeline 280.

In this embodiment, the second heat dissipation flow channel is communicated by opening the second check valve 291 disposed on the second water inlet pipeline 250 and the second water outlet pipeline 260 and closing the second four-way valve 292 disposed on the fourth water inlet pipeline 270 and the fourth water outlet pipeline 280; the second four-way valve 292 arranged on the fourth water inlet pipeline 270 and the fourth water outlet pipeline 280 is opened, and the second one-way valve 291 arranged on the second water inlet pipeline 250 and the second water outlet pipeline 260 is closed, so that the second heating flow channels are communicated, and the second heat dissipation flow channels and the second heating flow channels are alternatively communicated, so that the flow direction of heat exchange medium in the second flow channels 230 is changed under the condition that the second heat exchange medium inlet 210 and the second heat exchange medium outlet 220 are not changed, different working conditions of the battery module are adapted, and the adaptability of the battery box heat exchange plate 10 is provided.

It should be noted that, the second four-way valve 292 is specially designed, and the cross pipes in the ball valve of the second four-way valve 292 are non-coplanar, and there is a height difference between the upper and lower pipes. In other words, the second four-way valve 292 includes two second pipes (not shown) that are non-coplanar and have a height difference and are in a cross-like state, and the two second pipes are respectively connected to the fourth water inlet pipeline 270 and the fourth water outlet pipeline 280.

In summary, the present utility model provides a heat exchange plate 10 for a battery box and a heat exchange system for a battery box, in which the first flow channel 130 and the second flow channel 230 extend in a meandering and divergent manner on the heat exchange plate 10 for the battery box in a direction from the inner side to the outer side, so that a heat dissipation medium first enters the central region 300 and exchanges heat with the central portion of the battery module corresponding to the central region 300, and further the heat dissipation and the temperature reduction of the battery module are significantly and effectively performed, thereby achieving the purpose of improving the heat exchange efficiency of the battery box.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A battery box heat exchange plate, characterized in that the battery box heat exchange plate has:

a first heat exchange medium inlet and a second heat exchange medium inlet for conveying heat exchange medium;

a first heat exchange medium outlet and a second heat exchange medium outlet for outputting heat exchange medium;

a first flow passage communicating the first heat exchange medium inlet and the first heat exchange medium outlet;

a second flow passage communicating the second heat exchange medium inlet and the second heat exchange medium outlet;

the first flow channel and the second flow channel are positioned on two opposite sides of the battery box heat exchange plate;

the first flow channel flows through a first heat exchange area from the first heat exchange medium inlet, and outwards meanders and divergently extends to the first heat exchange medium outlet from the side close to the second flow channel in the first heat exchange area, wherein the first heat exchange area is used for exchanging heat to the battery module;

the second flow channel flows through a second heat exchange area from the second heat exchange medium inlet, and outwards meanders and divergently extends to the second heat exchange medium outlet from the side close to the first flow channel in the second heat exchange area, wherein the second heat exchange area is used for exchanging heat with the battery module.

2. The battery box heat exchange plate of claim 1 wherein the first and second flow channels each extend in a serpentine, divergent shape having a C-shape.

3. The battery box heat exchange plate of claim 1, further comprising a first one-way valve and a second one-way valve, wherein the first one-way valve is disposed in the first flow channel and the second one-way valve is disposed in the second flow channel.

4. The battery box heat exchange plate of claim 3, further comprising a first four-way valve and a second four-way valve, wherein the first four-way valve is disposed in the first flow channel, and the second four-way valve is disposed in the second flow channel;

the first one-way valve and the first four-way valve are used for switching the flow direction of the first flow channel together, and the second one-way valve and the second four-way valve are used for switching the flow direction of the second flow channel together.

5. A battery box heat exchange system, comprising the battery box heat exchange plate and a battery module set according to any one of claims 1-2, wherein the battery module set is placed in the first heat exchange area and the second heat exchange area, and the battery box heat exchange plate is used for exchanging heat with the battery module set.

6. The battery box heat exchange system as claimed in claim 5, wherein the battery box heat exchange system comprises a first water inlet pipeline and a first water outlet pipeline, the first water inlet pipeline is connected with one end of the first flow channel close to the second heat exchange area, the first water outlet pipeline is connected with one end of the first flow channel far away from the second heat exchange area, and the first heat exchange medium inlet, the first water inlet pipeline, the first flow channel, the first water outlet pipeline and the first heat exchange medium outlet are sequentially connected and form a first heat dissipation flow channel;

the battery box heat exchange system comprises a second water inlet pipeline and a second water outlet pipeline, the second water inlet pipeline is connected with one end, close to the first heat exchange area, of the second flow channel, the second water outlet pipeline is connected with one end, far away from the first heat exchange area, of the second flow channel, and the second heat exchange medium inlet, the second water inlet pipeline, the second flow channel, the second water outlet pipeline and the second heat exchange medium outlet are sequentially connected and form a second heat dissipation flow channel.

7. The battery compartment heat exchange system of claim 6, wherein the first water inlet and outlet lines are each provided with a first one-way valve; the second water inlet pipeline and the second water outlet pipeline are both provided with second check valves.

8. The battery box heat exchange system as set forth in claim 6 further comprising a third water inlet pipe connected to an end of the first flow passage remote from the second heat exchange area and a third water outlet pipe connected to an end of the first flow passage near the second heat exchange area, the first heat exchange medium inlet, the third water inlet pipe, the first flow passage, the third water outlet pipe, and the first heat exchange medium outlet being connected in sequence and forming a first heating flow passage;

the battery box heat exchange system further comprises a fourth water inlet pipeline and a fourth water outlet pipeline, the fourth water inlet pipeline is connected with one end, far away from the first heat exchange area, of the second flow channel, the fourth water outlet pipeline is connected with one end, close to the first heat exchange area, of the second flow channel, and the second heat exchange medium inlet, the fourth water inlet pipeline, the second flow channel, the fourth water outlet pipeline and the second heat exchange medium outlet are sequentially connected to form a second heating flow channel;

the first heat dissipation flow channel is selectively communicated with the first heating flow channel, and the second heat dissipation flow channel is selectively communicated with the second heating flow channel.

9. The heat exchange system of claim 8, wherein the third water inlet pipeline and the third water outlet pipeline are arranged in a crossing manner, and a first four-way valve is arranged at the crossing position of the third water inlet pipeline and the third water outlet pipeline;

the fourth water inlet pipeline and the fourth water outlet pipeline are arranged in a crossing mode, and a second four-way valve is arranged at the crossing position of the fourth water inlet pipeline and the fourth water outlet pipeline.

10. The heat exchange system according to claim 9, wherein the first four-way valve comprises two first pipes, the two first pipes are non-coplanar and have a height difference and are in a cross-like state, and the two first pipes are respectively communicated with the third water inlet pipeline and the third water outlet pipeline;

the second four-way valve comprises two second pipelines, wherein the two second pipelines are non-coplanar and have height differences and are in a cross state, and the two second pipelines are respectively communicated with the fourth water inlet pipeline and the fourth water outlet pipeline.

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