CN114335818A - Power battery cooling plate - Google Patents

Abstract

The invention provides a power battery cooling plate which comprises a supporting plate, a flow channel plate and a flow distribution plate, wherein a cooling medium inlet and a cooling medium outlet are formed in the supporting plate, a cooling medium liquid inlet channel, a cooling medium liquid collecting channel and a plurality of cooling medium cooling channels are formed between the supporting plate and the flow channel plate, a cooling medium liquid distribution channel is formed between the flow distribution plate and the supporting plate, one end of the cooling medium liquid distribution channel is communicated with the cooling medium liquid inlet channel through a liquid inlet hole penetrating through the supporting plate, the inlet of each cooling medium cooling channel is communicated with the cooling medium liquid distribution channel through a flow distribution hole penetrating through the supporting plate, the flow distribution holes are sequentially distributed along the flow direction of a cooling medium in the cooling medium liquid distribution channel, and the aperture of each flow distribution hole is sequentially increased along the flow direction of the cooling medium in the cooling medium liquid distribution channel. The power battery cooling plate can improve the uniformity of cooling medium shunting in the cooling plate and improve the cooling effect of the cooling plate.

Description

Power battery cooling plate

Technical Field

The invention relates to the technical field of power battery thermal management, in particular to a power battery cooling plate.

Background

Because the environmental temperature of the power battery system and the temperature of the battery directly affect the normal operation, the cycle life, the charging acceptability, the output power, the available energy, the safety and the reliability of the battery, in order to ensure the optimal performance and the service life of the battery, a thermal management system is required to be introduced to carry out low-temperature heating, high-temperature heat dissipation and thermal insulation management on the battery so as to limit the temperature rise and the temperature difference of the battery, realize the temperature homogenization of the battery pack, ensure the battery to work in an appropriate temperature range, reduce the performance attenuation of the battery and eliminate other potential safety risks.

The battery thermal management system is one of key technologies for solving the heat-related problems of the battery and ensuring the service performance, safety and service life of the power battery. The main functions of the battery thermal management system include effective heat dissipation when the battery temperature is high, thermal runaway accidents are prevented from occurring, preheating is performed when the battery temperature is low, the battery temperature is improved, charging and discharging performance and safety at low temperature are guaranteed, temperature difference in the battery pack is reduced, formation of a local hot area is inhibited, the battery at a high-temperature position is prevented from being attenuated too fast, and the overall service life of the battery pack is shortened.

In the prior art, the heat management mode of the battery heat management system mainly comprises air cooling and liquid cooling, wherein the air cooling belongs to a first generation battery cooling mode and supplies air through an air duct to dissipate heat. Liquid cooling is the mainstream heat dissipation mode at present, and generally contacts with the battery through a cooling plate, and utilizes a cooling medium (mainly comprising glycol and water) circulating in the cooling plate to dissipate heat of the power battery.

At present, with the capacity of a power battery becoming larger and larger, and more manufacturers also beginning to adopt a high-rate quick-charging mode, the heat exchange amount of the power battery becomes larger and larger. However, the existing battery cold plate in the market still has the problems of uneven distribution of cooling medium, easy local overheating, large flow resistance and the like.

Disclosure of Invention

In view of the above, the present invention is directed to a power battery cooling plate, so as to improve the uniformity of the cooling medium flow distribution in the cooling plate.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a power battery cooling plate comprises a supporting plate, a runner plate connected to one side of the supporting plate, and a splitter plate connected to the other side of the supporting plate opposite to the runner plate, wherein a cooling medium inlet and a cooling medium outlet are formed in the supporting plate;

a cooling medium liquid inlet channel, a cooling medium liquid collecting channel and a plurality of cooling medium cooling channels are formed between the supporting plate and the runner plate, the cooling medium liquid inlet channel is communicated with the cooling medium inlet, the outlet of each cooling medium cooling channel is communicated with the cooling medium liquid collecting channel, and the cooling medium liquid collecting channel is communicated with the cooling medium outlet;

a cooling medium liquid distribution channel is formed between the flow distribution plate and the support plate, one end of the cooling medium liquid distribution channel is communicated with the cooling medium liquid inlet channel through a liquid inlet hole penetrating through the support plate, an inlet of each cooling medium cooling channel is communicated with the cooling medium liquid distribution channel through a flow distribution hole penetrating through the support plate, the flow distribution holes are sequentially arranged along the flow direction of the cooling medium in the cooling medium liquid distribution channel, and the aperture of each flow distribution hole is sequentially increased along the flow direction of the cooling medium in the cooling medium liquid distribution channel.

Further, the flow channel plate is formed with a coolant inlet groove, a coolant collecting groove, and a plurality of coolant cooling grooves, the coolant inlet passage is formed by covering the coolant inlet groove with the support plate, the coolant collecting passage is formed by covering the coolant collecting groove with the support plate, and the plurality of coolant cooling passages are formed by covering the coolant cooling grooves with the support plate.

Further, a plurality of the cooling medium cooling channels are arranged side by side, and the cooling medium cooling channels are arranged in sequence along the flow direction of the cooling medium in the cooling medium dividing channel.

Furthermore, two groups of cooling medium cooling channels which are respectively arranged on two opposite sides are formed between the supporting plate and the flow channel plate, the cooling medium liquid inlet channel is positioned between the two groups of cooling medium cooling channels, the cooling medium liquid collecting channel, the cooling medium outlet and the cooling medium liquid collecting channel are respectively arranged corresponding to each group of cooling medium cooling channels, and each cooling medium liquid separating channel is communicated with the liquid inlet hole.

Further, the number of the cooling medium cooling channels in each group is between 1 and 10.

Further, coolant cooling passageway includes the feed liquor branch road, and parallelly connected a plurality of liquid branches that return of feed liquor branch road one end, the other end of feed liquor branch road with the reposition of redundant personnel hole intercommunication, and each the liquid branch road that returns all with coolant collection liquid channel intercommunication, and be equipped with respectively on the double-phase offside of feed liquor branch road return the liquid branch road.

Further, coolant cooling channel still includes connecting branch, both sides the liquid return branch is respectively through connecting branch with the feed liquor branch intercommunication, just connecting branch is sharp or crooked shape.

Further, the cooling medium liquid collecting channel is obliquely arranged relative to the cooling medium cooling channels along the arrangement direction of the cooling medium cooling channels.

Furthermore, a cooling medium liquid separating groove is formed on the flow dividing plate, and the cooling medium liquid separating groove is covered by the support plate to form the cooling medium liquid separating channel.

Further, the device also comprises a flow divider;

the shunt is connected in the backup pad, just be equipped with coolant medium feed liquor connector and coolant medium back liquid connector on the shunt, coolant medium feed liquor connector with coolant medium import intercommunication, coolant medium back liquid connector with the coolant medium export intercommunication.

Compared with the prior art, the invention has the following advantages:

according to the power battery cooling plate, the cooling medium liquid inlet channel, the cooling medium liquid collecting channel, the cooling medium liquid dividing channel and the plurality of cooling medium cooling channels are formed, the cooling medium liquid inlet channel is communicated with the cooling medium inlet, the outlets of the cooling medium cooling channels are communicated with the cooling medium liquid collecting channel, the cooling medium liquid collecting channel is communicated with the cooling medium outlet, the cooling medium liquid dividing channel is communicated with the cooling medium liquid inlet channel through the liquid inlet hole, the inlets of the cooling medium cooling channels are communicated with the cooling medium liquid dividing channel through the liquid dividing holes, and therefore a cooling medium circulation loop communicated between the cooling medium inlet and the cooling medium outlet can be formed in the cooling plate, and the cooling function of the cooling plate can be achieved under the circulating flow of the cooling medium.

Meanwhile, the cooling medium distribution holes are sequentially distributed along the flow direction of the cooling medium in the cooling medium distribution channel, and particularly, the aperture of each distribution hole is sequentially increased along the flow direction of the cooling medium in the cooling medium distribution channel, so that the cooling medium can uniformly enter each cooling medium cooling channel, the cooling capacity of each cooling medium cooling channel is equivalent, the distribution uniformity of the cooling medium in the cooling plate can be improved, and the cooling effect of the cooling plate on the power battery can be improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a power battery cooling plate according to an embodiment of the invention;

FIG. 2 is an enlarged view of a portion of the structure shown in FIG. 1;

FIG. 3 is a schematic structural diagram of a supporting plate according to an embodiment of the present invention;

FIG. 4 is a schematic view of the distribution holes according to the embodiment of the present invention;

fig. 5 is a schematic structural view of a flow field plate according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of the structure shown in FIG. 5;

fig. 7 is a schematic structural diagram of a flow distribution plate according to an embodiment of the present invention;

fig. 8 is a schematic view of the back of a diverter plate according to an embodiment of the present invention;

fig. 9 is a schematic view of another structure of a flow field plate according to an embodiment of the present invention;

fig. 10 is a schematic view of a flow field plate according to another structure of the embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a power battery cooling plate with a shunt according to an embodiment of the present invention;

FIG. 12 is a schematic view of a diverter and a platen according to an embodiment of the present invention;

FIG. 13 is a schematic view of the internal structure of the flow divider and the pressure plate according to the embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a platen according to an embodiment of the present invention;

fig. 15 is a back schematic view of a power battery cooling plate strip with a flow diverter according to an embodiment of the invention.

Description of reference numerals:

1. a support plate; 2. a runner plate; 3. a flow distribution plate; 4. a cooling medium inlet; 5. a cooling medium outlet; 6. a flow divider; 7. pressing a plate; 8. mounting holes;

101. a liquid inlet hole; 102. a shunt hole; 103. a support plate connection hole; 104. a bump;

201. a cooling medium inlet passage; 202. a communication channel; 203. a cooling medium liquid collection channel; 204. a cooling medium cooling passage; 2041. a liquid inlet branch; 2042. a liquid return branch; 2043. connecting the branch circuits; 205. a runner plate connecting hole;

301. a cooling medium flow-dividing passage; 302. bulging;

601. a cooling medium liquid inlet connector; 602. a cooling medium return liquid connector;

701. mounting a through hole; 702. a connecting end; 703. a gasket seal.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The embodiment relates to a power battery cooling plate which is a direct cooling plate type and is mainly used as a part of a power battery thermal management system for exchanging heat with a power battery so as to manage the temperature of the power battery.

In terms of overall design, as shown in fig. 1 and 2, the power battery cooling plate of the present embodiment includes a support plate 1, a flow channel plate 2 connected to one side of the support plate 1, and a flow distribution plate 3 connected to the other side of the support plate 1 with respect to the flow channel plate 2, and a cooling medium inlet 4 and a cooling medium outlet 5 are provided on the support plate 1.

Further, the present embodiment is formed with a cooling medium inlet channel 201, a cooling medium header channel 203, and a plurality of cooling medium cooling channels 204 between the support plate 1 and the flow channel plate 2. The cooling medium inlet channel 201 is communicated with the cooling medium inlet 4, the outlet of each cooling medium cooling channel 203 is communicated with the cooling medium liquid collecting channel 203, and the cooling medium liquid collecting channel 203 is communicated with the cooling medium outlet 5.

Meanwhile, in this embodiment, a cooling medium liquid distribution channel 301 is also formed between the flow distribution plate 3 and the support plate 1, one end of the cooling medium liquid distribution channel 301 is communicated with the cooling medium liquid inlet channel 201 through a liquid inlet hole 101 penetrating through the support plate 1, and inlets of the cooling medium cooling channels 203 are respectively communicated with the cooling medium liquid distribution channel 301 through flow distribution holes 102 penetrating through the support plate 1.

In addition, the respective branch flow holes 102 are arranged in order along the flow direction of the cooling medium in the cooling medium distribution passage 301, and the aperture of each branch flow hole 102 is increased in order along the flow direction of the cooling medium in the cooling medium distribution passage 301.

Specifically, the structure of the support plate 1 is as shown in fig. 3, which is a rectangular plate, the liquid inlet hole 101 and the branch flow hole 102 are disposed on the support plate 1, and the cooling medium inlet 4 and the cooling medium outlet 5 are also disposed on the support plate 1. In addition, a plurality of support plate connecting holes 103 are arranged at intervals on the edge of the ring support plate 1, and the support plate connecting holes 103 are used for connecting the whole cooling plate and the power battery pack.

It should be noted that, as a preferred embodiment, two sets of cooling medium cooling passages 204 are formed between the support plate 1 and the flow field plate 2. The cooling medium liquid inlet channel 201 is located between the two groups of cooling medium cooling channels 204, and is provided with a cooling medium liquid collecting channel 203, a cooling medium outlet 5 and a cooling medium liquid collecting channel 301 corresponding to each group of cooling medium cooling channels 204, and each cooling medium liquid separating channel 301 is communicated with the liquid inlet hole 101.

In specific implementation, preferably, the number of the cooling medium cooling channels 204 in the two sets of cooling medium cooling channels 204 may be the same, and the cooling medium inlet channel 201 may be arranged at the middle of the cooling medium cooling channels 204 on both sides, so that the cooling medium cooling channels 204 on both sides are symmetrically arranged with respect to the cooling medium inlet channel 201.

And two sets of cooling medium cooling channels 204 are provided, as shown in fig. 3, at this time, the two sets of branch holes 102 provided on the support plate 1 are respectively provided on both sides of the liquid inlet hole 102, and at the same time, two sets of cooling medium outlet holes 5 are provided on both sides of the cooling medium inlet 4. And the cooling medium outlet 5 on each side and the branch flow holes 102 on the same side are arranged corresponding to the same group of cooling medium cooling passages 204.

In this embodiment, the aperture of each diversion hole 102 increases in sequence along the flow direction of the cooling medium in the cooling medium diversion channel 301, which can be specifically seen in fig. 4. In practical implementation, the specific aperture of each branch flow hole 102 and the variation of the aperture between adjacent branch flow holes 102 may be set according to the specification of the cooling plate, the flow rate of the cooling medium in each cooling medium cooling passage 204, and the like. The arrangement is such that the flow rates of the cooling mediums flowing through the cooling medium cooling channels 204 are substantially the same, so as to achieve uniform flow of the cooling mediums and improve the uniformity of cooling medium distribution in the cooling plate.

The flow channel plate 2 of the present embodiment has a structure as shown in fig. 5 and 6, which is also rectangular as it is arranged with the support plate 1, and the flow channel plate 2 is provided with flow channel plate coupling holes 204. The plurality of flow channel plate connection holes 204 are provided at the edge of the flow channel plate 2, and are generally arranged in one-to-one correspondence to the support plate connection holes 103 of the support plate 1, so that after the support plate 1 and the flow channel plate 2 are connected together, the flow channel plate connection holes 204 and the support plate connection holes 103 are aligned, and are further used for fixedly connecting the cooling plates.

It is noted that the rectangular plate is used to match the shape of the current power battery. The shape of the support plate 1 and the flow channel plate 2 may be other shapes in the present embodiment, and the shapes of the flow channel plate 2 and the support plate 1 may be different, which is not limited.

In addition, in the present embodiment, as a preferred embodiment, the flow channel plate 2 is formed with a coolant inlet tank, a coolant header tank, and a plurality of coolant cooling tanks. The above-mentioned grooves may be formed on the flow channel plate 2 by means of stamping, and the cooling medium inlet channel 201 may be formed by covering the cooling medium inlet groove with the support plate 1 via the connection between the support plate 1 and the flow channel plate 2. Similarly, the coolant header channel 203 can be formed by covering the coolant header tank with the support plate 1, and the coolant cooling channels 204 can be formed by covering the coolant cooling tanks with the support plate 1.

This embodiment is through forming coolant feed liquor groove, coolant collecting tank and coolant cooling tank to rethread backup pad 1 and the flow channel plate 2 between be connected, and then enclose the mode that forms corresponding passageway by each groove and backup pad 1, its shaping mode is simple, can make spare part quantity in the cooling plate less, meanwhile, utilize each groove that forms, also have the effect that improves 2 structural strength of flow channel plate, can promote the holistic structural stability of cooling plate from this.

Moreover, with above-mentioned coolant feed liquor groove, coolant collecting tank and coolant cooling bath etc. set up on flow path plate 2, when the cooling plate used, backup pad 1 was located the top, and power battery passes through the contact of heat conduction silica gel with the surface of backup pad 1, and flow path plate 2 then is located the below, also can guarantee the reliability of contact between cooling plate and the power battery like this to do benefit to the heat exchange between power battery and the cooling plate.

As also shown in fig. 5, the plurality of cooling medium cooling passages 204 in each group in the present embodiment are also preferably arranged side by side, and specifically, the cooling medium cooling passages 204 are arranged in sequence along the flow direction of the cooling medium in the cooling medium dividing passage 301.

In practical applications, the number of the cooling medium cooling channels 204 in each group of cooling medium cooling channels 204 should be set to be between 1 and 10, and for example, the number of the cooling medium cooling channels 204 in each group of cooling medium cooling channels 204 may be 1, 2, 4, 5, 6, 8, or 10.

In addition, as an implementation form, for each cooling medium cooling channel 204, the cooling medium cooling channel 204 of the present embodiment also specifically includes a liquid inlet branch 2041, and a plurality of liquid return branches 2042 connected in parallel to one end of the liquid inlet branch 2041. Meanwhile, the other end of the liquid inlet branch 2041 is communicated with the flow dividing hole 102, each liquid return branch 2042 is communicated with the cooling medium liquid collecting channel 203, and liquid return branches 2042 are respectively arranged on two opposite sides of the liquid inlet branch 2041.

In an implementation, referring to fig. 5 or fig. 6 again, a liquid return branch 2042 may be disposed on each of two opposite sides of the liquid inlet branch 2041. In addition, in order to facilitate connection between the liquid return branch 2042 and the liquid inlet branch 2041, a connecting branch 2043 may be further provided in the cooling medium cooling passage 204 of the present embodiment. At this time, the liquid return branches 2042 on both sides are respectively communicated with the liquid inlet branch 2041 through the connecting branch 2043, and as shown in fig. 9 and 10, the connecting branch 2043 may be designed to be straight or curved. The curved connecting branch 2043 can reduce the resistance of the cooling medium flowing between the liquid inlet branch 2041 and the liquid return branch 2042 to some extent.

In this embodiment, the structure of flow distribution plate 3 is as shown in fig. 7 and fig. 8, and it is specifically a strip-shaped plate, and the width of this flow distribution plate 3 only need can the shaping foretell coolant divides liquid passage can, so can greatly reduced flow distribution plate 3's weight, and be favorable to the whole lightweight design of cooling plate.

Also, in a manner similar to the molding of the cooling medium inlet channel, the cooling medium collecting channel and the cooling medium cooling channel, the cooling medium separating tank is formed on the dividing plate 3, and is also covered by the support plate 1 through the connection of the dividing plate 3 to the support plate 1 to form the cooling medium separating channel 301.

The coolant distribution grooves can also be formed on the distribution plate 3 in the pressing direction. At this time, the cooling medium liquid separating groove is punched on the end surface of one side of the flow distribution plate 3, so that the part of the cooling medium liquid separating groove on the flow distribution plate 3 bulges to the other side of the flow distribution plate 3, that is, the side opposite to the support plate 1, and the bulge 302 can be formed on the end surface of the other side of the flow distribution plate 3. Of course, when the coolant inlet tank, the coolant collecting tank, and the coolant cooling tank are formed by pressing the flow channel plate 2, the same structure as that of the bulge 302 is formed on the end surface of the flow channel plate 2 facing away from the support plate 1.

In this embodiment, the formation of the bulge 302 on the flow distribution plate 3 not only provides possibility for the molding of the cooling medium liquid distribution channel 301, but also the bulge 302 can increase the structural strength of the flow distribution plate 3 itself, which is the same as the arrangement of the cooling medium liquid inlet groove, the cooling medium liquid collecting groove, the cooling medium cooling groove, and the like on the flow channel plate 2.

As a preferred embodiment, in combination with the embodiment shown in fig. 5 to 8, the cooling medium liquid collecting channel 203 may be arranged obliquely with respect to the cooling medium cooling channels 204 along the arrangement direction of the cooling medium cooling channels 204, so that the included angle between the liquid return branch 2042 and the cooling medium liquid collecting channel 203 is an obtuse angle. This reduces the right-angle structure in the coolant flow path, thereby achieving the effect of reducing the coolant flow resistance.

When the coolant collecting channel 203 is disposed obliquely with respect to the coolant cooling channel 204, the arrangement direction of the plurality of flow distribution holes 102 on each side is also oblique, and preferably, the flow distribution plate 3 may be disposed in a conformal manner, and also disposed obliquely. At this time, the flow distribution plate 3 of the present embodiment has a V-shaped structure as a whole, an included angle α formed by the V-shaped structure is an obtuse angle, and a vertex of the V-shaped structure corresponds to the liquid inlet hole 101.

It should be noted that, in the implementation, this embodiment can refer to fig. 10, so that the cooling medium outlet 5 is directly connected to the cooling medium collecting channel 203. However, in order to facilitate the arrangement of the cooling medium outlet 5, the cooling medium outlet 5 and the cooling medium inlet 4 are arranged at the edge positions of the cooling plate. As a preferred embodiment, the present embodiment may further form a communication passage 202 between the support plate 1 and the flow field plate 2. The communication passage 202 is formed in the same manner as the other passages, and one end of the communication passage 202 communicates with the cooling medium liquid collecting passage 203 and the other end communicates with the cooling medium liquid outlet.

Still referring to fig. 9 and 10, this embodiment is also noted that, in addition to the oblique arrangement of the cooling medium liquid collecting channel 203 as described above, it is of course possible to arrange it orthogonally with respect to the cooling medium cooling channel 204. Besides, it is also possible that, in addition to the two liquid return branches 2042 in each cooling medium cooling channel 204 being respectively connected to the cooling medium header channel 203, the two liquid return branches 2042 are connected in parallel first and then connected to the cooling medium header channel 203 via a communication structure.

In addition, it is also possible to provide the inlet passage 201 in two as shown in fig. 9, of course, when the cooling medium cooling passage 204 has two sets, instead of providing one as shown in fig. 5 and 6. When there are two liquid inlet channels 201, correspondingly, there are two liquid inlet holes 101, and the two liquid inlet channels 201 and the two sets of cooling medium cooling channels 204 correspond to each other one by one.

In this embodiment, the support plate 1 and the flow field plate 2, and the support plate 1 and the splitter plate 3, are connected by brazing, and the welds are used to form seals to the channel structures punched in the flow field plate 2 or the cooling plate 3 to define the desired channels. Moreover, the cooling medium of the embodiment may be a cooling medium or a refrigerant, and during a specific operation, the cooling medium enters the cooling plate from the flow divider, flows through the cooling plate, and particularly when flowing in the cooling medium cooling channel 204, the phase change heat absorption occurs to take away heat of the power battery, so as to achieve a cooling purpose.

Besides the above-mentioned structures, as a preferred embodiment, a flow divider 6 may be further disposed on the power battery cooling plate of the present embodiment, as shown in fig. 11. The flow divider 6 is provided with a cooling medium inlet connection port 601 and a cooling medium return connection port 602, and the cooling medium inlet connection port 601 is communicated with the cooling medium inlet 4, and the cooling medium return connection port 602 is communicated with the cooling medium outlet 5.

The above-described flow divider 6 is used in particular for the connection between a cooling plate and a coolant line in a motor vehicle, and the flow divider 6 can be of conventional construction as is used in the field of cooling plates in general. In the case where the cooling medium cooling channels 204 of the present embodiment are provided in two sets, and the cooling medium header channel 203 and the cooling medium outlet 5 are provided in two sets, two flow paths should be provided in the flow divider 6, one end of each flow path being connected in parallel to the cooling medium return connection port 602, and the other end thereof being connected to each of the two cooling medium outlets 5.

In specific implementation, as a possible implementation form of the connection between the flow divider 6 and the cooling plate, see fig. 2, in this embodiment, a mounting hole 8 is provided on the cooling plate and penetrates through the support plate 1 and the flow channel plate 2 together, and as shown in fig. 12, a pressure plate 7 is also provided at the bottom of the flow divider 6, the pressure plate 7 is connected to the support plate 1 and connected to the support plate 1 by brazing, and the flow divider 6 can be fixed to the pressure plate 7 by bolts penetrating through the mounting hole 8 and the pressure plate 7, thereby achieving the fixed connection of the flow divider 6 on the cooling plate.

As shown in fig. 13 and 14, channels respectively communicating with the cooling medium inlet connection 601 and the cooling medium return connection 602 are provided in the flow divider 6, channels for communicating the cooling medium inlet 4 and the cooling medium outlet 5 with the flow divider 6 are also correspondingly provided in the pressure plate 7, convex connection ends 702 are respectively formed on the top of the pressure plate 7 corresponding to the channels in the pressure plate 7, the connection ends 702 are respectively corresponding to the channels formed in the flow divider 6, and a sealing gasket 703 is further sleeved on each connection end 702. When the flow divider 6 is placed on the pressure plate 7, as shown in fig. 13, each connection end 702 is inserted with interference into the corresponding channel of the flow divider 6, and the sealing gasket 703 is used to seal between the flow divider 6 and the pressure plate 7.

Corresponding to the mounting hole 8, a mounting through hole 701 is formed in the pressure plate 7, and the bolt for fixedly connecting the shunt 6 is threaded in the threaded hole at the bottom of the shunt 6 after passing through the mounting through hole 701. When the flow divider 6 is connected, as shown in fig. 13 and fig. 15, the flow divider 6 is inserted into the pressure plate 7, bolts are inserted from the back of the cooling plate, the bolts pass through the mounting holes 8 and the mounting through holes 701, and finally the flow divider 6 is screwed and fastened.

The power battery cooling plate of the embodiment is formed by a cooling medium liquid inlet channel 201, a cooling medium liquid collecting channel 203, a cooling medium liquid separating channel 301 and a plurality of cooling medium cooling channels 204, wherein the cooling medium liquid inlet channel 201 is communicated with a cooling medium inlet 4, an outlet of each cooling medium cooling channel 204 is communicated with the cooling medium liquid collecting channel 203, the cooling medium liquid collecting channel 203 is communicated with a cooling medium outlet 5, the cooling medium liquid separating channel 301 is communicated with the cooling medium liquid inlet channel 201 through a liquid inlet hole 101, and inlets of each cooling medium cooling channel 204 are respectively communicated with the cooling medium liquid separating channel 301 through a liquid dividing hole 102.

This makes it possible to form a cooling medium circulation circuit in the cooling plate, the cooling medium circulation circuit communicating between the cooling medium inlet 4 and the cooling medium outlet 5, and to realize the cooling function of the cooling plate by circulating the cooling medium.

Meanwhile, in the embodiment, the flow direction of the cooling medium in the cooling medium liquid distribution channel 301 is sequentially arranged through the flow distribution holes 102, and particularly, the aperture of each flow distribution hole 102 is sequentially increased along the flow direction of the cooling medium in the cooling medium liquid distribution channel 301, so that the cooling medium can enter each cooling medium cooling channel 204 more uniformly, the cooling capacity of each cooling medium cooling channel 204 is equivalent, the flow distribution uniformity of the cooling medium in the cooling plate can be improved, the cooling effect of the cooling plate on the power battery is improved, and the cooling plate has good practicability.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A power battery cooling plate is characterized in that:

the cooling device comprises a supporting plate (1), a flow channel plate (2) connected to one side of the supporting plate (1), and a flow distribution plate (3) which is opposite to the flow channel plate (2) and connected to the other side of the supporting plate (1), wherein a cooling medium inlet (4) and a cooling medium outlet (5) are formed in the supporting plate (1);

a cooling medium liquid inlet channel (201), a cooling medium liquid collecting channel (203) and a plurality of cooling medium cooling channels (204) are formed between the support plate (1) and the flow channel plate (2), the cooling medium liquid inlet channel (201) is communicated with the cooling medium inlet (4), the outlet of each cooling medium cooling channel (203) is communicated with the cooling medium liquid collecting channel (203), and the cooling medium liquid collecting channel (203) is communicated with the cooling medium outlet (5);

a cooling medium liquid distribution channel (301) is formed between the flow distribution plate (3) and the support plate (1), one end of the cooling medium liquid distribution channel (301) is communicated with the cooling medium liquid inlet channel (201) through a liquid inlet hole (101) penetrating through the support plate (1), inlets of the cooling medium cooling channels (203) are communicated with the cooling medium liquid distribution channel (301) through flow distribution holes (102) penetrating through the support plate (1), the flow distribution holes (102) are sequentially distributed along the flow direction of the cooling medium in the cooling medium liquid distribution channel (301), and the pore diameters of the flow distribution holes (102) are sequentially increased along the flow direction of the cooling medium in the cooling medium liquid distribution channel (301).

2. The power battery cooling plate of claim 1, wherein:

the flow channel plate (2) is provided with a coolant inlet groove, a coolant collecting groove, and a plurality of coolant cooling grooves, the coolant inlet channel (201) is formed by covering the coolant inlet groove with the support plate (1), the coolant collecting channel (203) is formed by covering the coolant collecting groove with the support plate (1), and the plurality of coolant cooling channels (204) are formed by covering the coolant cooling grooves with the support plate (1).

3. The power battery cooling plate of claim 1, wherein:

the plurality of cooling medium cooling channels (204) are arranged side by side, and the cooling medium cooling channels (204) are sequentially arranged along the flow direction of the cooling medium in the cooling medium diversion channel (301).

4. The power battery cooling plate of claim 3, wherein:

two groups of cooling medium cooling channels (204) which are respectively arranged on two opposite sides are formed between the support plate (1) and the flow channel plate (2), the cooling medium liquid inlet channel (201) is positioned between the two groups of cooling medium cooling channels (204), the cooling medium liquid collecting channel (203), the cooling medium outlet (5) and the cooling medium liquid collecting channel (301) are respectively arranged corresponding to the groups of cooling medium cooling channels (204), and the cooling medium liquid separating channels (301) are communicated with the liquid inlet holes (101).

5. The power battery cooling plate of claim 4, wherein:

the number of the cooling medium cooling channels (204) in each group of the cooling medium cooling channels (204) is between 1 and 10.

6. The power battery cooling plate of claim 3, wherein:

cooling medium cooling channel (204) are including feed liquor branch road (2041), and parallelly connected a plurality of liquid branch roads (2042) of returning of feed liquor branch road (2041) one end, the other end of feed liquor branch road (2041) with reposition of redundant personnel hole (102) intercommunication, and each liquid branch road (2042) all with cooling medium collection liquid channel (203) intercommunication returns, and the double-phase offside of feed liquor branch road (2041) is equipped with respectively liquid branch road (2042) returns.

7. The power battery cooling plate of claim 6, wherein:

coolant cooling passageway (204) still include connecting branch way (2043), both sides return liquid branch way (2042) and pass through respectively connecting branch way (2043) with feed liquor branch way (2041) intercommunication, just connecting branch way (2043) are sharp or crooked shape.

8. The power battery cooling plate of claim 3, wherein:

the cooling medium liquid collecting channel (203) is obliquely arranged relative to the cooling medium cooling channel (204) along the arrangement direction of the cooling medium cooling channels (204).

9. The power battery cooling plate of claim 1, wherein:

a cooling medium liquid separating groove is formed on the flow dividing plate (3), and the cooling medium liquid separating channel (301) is formed by covering the cooling medium liquid separating groove by the support plate (1).

10. The power cell cooling plate according to any one of claims 1 to 9, wherein:

also comprises a flow divider (6);

shunt (6) are connected on backup pad (1), just be equipped with coolant liquid feed connector (601) and coolant return liquid connector (602) on shunt (6), coolant liquid feed connector (601) with coolant import (4) intercommunication, coolant return liquid connector (602) with coolant export (5) intercommunication.

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