Patent Description:
An independent battery module usually contains multiple cells. During the charging and discharging processes of the battery module, the chemical reactions of the multiple cells inside the battery module will generate a large amount of heat. Currently, a liquid cooling plate is often used to exchange heat with the battery module. However, at present, a battery pack is usually composed of multiple battery modules so as to form a high-power battery, and when the liquid cooling plate is used to perform heat exchange with the multiple battery modules, it is often necessary to perform bending process on the liquid cooling plate to increase the heat exchange area between the liquid cooling plate and the battery modules and improve the efficiency of the heat exchange between the liquid cooling plate and the battery modules. When the liquid cooling plate is bent, however, a flow passage at the bent part is easy to deform, causing the flow passage at the bend to crack.

<CIT> discloses a serpentine heat exchanger includes a tube formed by bonding two press-molded tube sheets and folded back in a serpentine shape, and a corrugated fin arranged in a space enclosed by the tube that is folded-back. An inside of a folded-back portion of the tube includes a plurality of protrusions at a distance from one another, the protrusions protruding from one tube sheet and contacting the other tube sheet.

<CIT> provides a heat management device and a battery module. The battery module comprises multiple layers of sub-modules. The heat management device comprises a liquid cooled flat tube arranged in the battery module, and the liquid cooled flat tube is in contact with each layer of sub-modules. The liquid cooled flat tube comprises a plurality of sub-flat tubes arranged at intervals and aplurality of bending and connecting parts, a space for accommodating the one layer of sub-modules or the two layers of sub-modules is formed between the every two adjacent sub-flat tubes, and the every two adjacent sub-flat tubes are communicated through the one bending and connecting part. Therefore, the liquid cooled flat tube can be made into a uniform shape, the sub-flat tubes of correspondinglengths are intercepted according to the lengths of all the sub-modules and are arranged at intervals, and the adjacent sub-flat tubes are connected through the one bending and connecting part.

The present invention provides a liquid cooling plate according to claim <NUM> and a battery pack, which are at least aimed to solve the problem that the flow passage at the bent part of the liquid cooling plate is prone to cracking.

A liquid cooling plate according to the invention comprises a first cooling plate, a second cooling plate and at least one reinforcement member. The first cooling plate comprises a first bent part. The second cooling plate is arranged side by side with the first cooling plate and is connected with the first cooling plate in a sealed manner. A cooling flow passage is formed between the second cooling plate and the first cooling plate. The second cooling plate comprises a second bent part. The second bent part corresponds to the first bent part. The at least one reinforcement member is disposed in the cooling flow passage between the first bent part and the second bent part. The reinforcement member has an arc-shaped structure, and a curvature in which the reinforcement member is bent is the same as a curvature in which the first bent part and the second bent part are bent.

In a possible implementation, a passage is formed in the reinforcement member, and the passage penetrates the reinforcement member along an extension direction of the cooling flow passage and is communicated with the cooling flow passage.

It can be seen that providing the passage ensures the smoothness of the cooling flow passage after the reinforcement member is added. When a heat exchange medium in the cooling flow passage flows through the reinforcement member between the first bent part and the second bent part, the heat exchanger medium can flow into the remaining of the cooling flow passage through the passage <NUM> of the reinforcement member.

In a possible implementation, the reinforcement member further comprises a plurality of spacer sheets, the plurality of spacer sheets are provided in the passage along an extension direction of the passage, and the plurality of spacer sheets divide the passage into a plurality of sub passages that are all communicated with the cooling flow passage.

It can be seen that the spacer sheets can be metal reinforcement ribs, thereby effectively preventing the spacer sheets from breaking due to the spacer sheets being impacted by the heat exchange medium for a long time. The plurality of sub passages can also allow the heat exchange medium between the first bent part and the second bent part to be diverted.

In a possible implementation, the reinforcement member comprises a first sub-part, a second sub-part and at least one third sub-part. The first sub-part and the second sub-part are arranged oppositely, and two ends of at least one of the third sub-parts are connected with the first sub-part and the second sub-part respectively, and at least one of the third sub-part divides the passage into at least two sub passages.

It can be seen that the reinforcement member can also be in an "I" shape, and the third sub-part divides the passage into a plurality of sub passages, so that the heat exchange medium is diverted in the sub f passages between the first bent part and the second bent part.

In a possible implementation, the reinforcement member may be made of foam metal.

It can be seen that the reinforcement member made of foam metal can slow down the flow rate of the heat exchange medium flowing through the reinforcement member, thereby reducing the lateral impact force generated by the heat exchange medium when flowing through the reinforcement member, and avoiding crack of the first bent part of the first cooling plate.

In a possible implementation, the reinforcement member is formed with a plurality of air holes, and the air holes are communicated with the cooling flow passage to allow the heat exchange medium in the cooling flow passage to pass through.

It can be seen that when the heat exchange medium flows through the foam metal, it can flow through the air holes communicated with the cooling flow passages, ensuring the circulation of the heat exchange medium between the first bent part and the second bent part.

In a possible implementation, the first cooling plate and the second cooling plate are formed with an accommodating space. The first cooling plate comprises a first body and a first flow passage provided on the first body. The first flow passage extends along the length direction of the first body and is formed by recessing from the first body in a direction away from the accommodating space. The second cooling plate comprises a second body and a second flow passage provided on the second body. The second body is arranged side by side with the first body on a side of the first body facing the accommodating space. The second flow passage extends along the length direction of the second body and is formed by recessing from the second body in a direction toward the accommodating space. The second flow passage corresponds to the first flow passage. The first body is connected with the second body in a sealed manner, and the second flow passage and the first flow passage are matched to jointly form the cooling flow passage surrounding the accommodating space.

It can be seen that the cooling flow passage jointly formed by the matched second flow passage and first flow passage allows a larger volume of the cooling flow passage, and more heat exchange medium can be input into the cooling flow passage at one time, effectively improving the heat exchange efficiency between the heat exchange medium and the battery modules.

In a possible implementation, the first flow passage comprises a first sub flow passage and a second sub flow passage distributed in the first body, and the first sub flow passage and the second sub flow passage are communicated with each other. The second flow passage comprises a third sub flow passage and a fourth sub flow passage distributed in the second body, and the third sub flow passage and the fourth sub flow passage are communicated with each other. The first sub flow passage corresponds to the third sub flow passage.

It can be seen that by dividing the first flow passage into the first sub flow passage and the second sub flow passage that are arranged side by side, the diversion path of the heat exchange medium in the first flow passage is increased, which can effectively improve the heat exchange efficiency; by dividing the second flow passage into the third sub flow passage and the fourth sub flow passage that are arranged side by side and communicated with each other, the diversion path of the heat exchange medium in the second flow passage is increased, which can effectively improve the heat exchange efficiency.

In a possible implementation, the liquid cooling plate comprises a plurality of reinforcement members, and the plurality of reinforcement members are disposed in the first sub flow passage and the third sub flow passage between the first bent part and the second bent part. The plurality of reinforcement members are disposed in the second sub flow passage and the fourth sub flow passage between the first bent part and the second bent part.

It can be seen that by providing the plurality of reinforcement members within the first sub flow passage and the third sub flow passage between the first bent part and the second bent part and within the second sub flow passage and the fourth sub flow passage between the first bent part and the second bent part, the side wall of each of the sub flow passages is reinforced to prevent the cooling flow passage between the first bent part and the second bent part from breaking.

A battery pack provided by an embodiment of the present disclosure comprises at least one battery module and the liquid cooling plate described in any of the embodiments of the present disclosure. The liquid cooling plate performs heat exchange with the at least one battery module.

In the liquid cooling plate and battery pack of the present disclosure, at least one reinforcement member is provided in the cooling flow passage between the first bent part of the first cooling plate and the second bent part of the second cooling plate, and the at least one reinforcement member can provide supporting force for the side wall of the cooling flow passage between the first bent part and the second bent part, thereby preventing the cooling flow passage from deforming and breaking, and ensuring the consistency of the cooling flow passage.

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the drawings to be used in the embodiments will be briefly introduced below.

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present disclosure.

The embodiments are described below with reference to the accompanying drawings, illustrating specific embodiments of the present disclosure that can be implemented. The directional terms mentioned herein, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the orientations of the drawings. Therefore, the directional terms used are for the purpose of better and clearer description and understanding of the present disclosure and do not indicate or imply that any device or component referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be construed as any limitation on the present disclosure.

In addition, the serial numbers assigned to components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connecting" and "coupling" mentioned in the present disclosure comprise direct and indirect connecting (coupling) unless otherwise specified.

Referring to <FIG>, in an embodiment of the present disclosure, there is provided a liquid cooling plate <NUM>. The liquid cooling plate <NUM> comprises a first cooling plate <NUM>, a second cooling plate <NUM> and at least one reinforcement member <NUM>. The first cooling plate <NUM> comprises a first bent part <NUM>. The second cooling plate <NUM> is arranged side by side with the first cooling plate <NUM> and is connected with the first cooling plate <NUM> in a sealed manner. A cooling flow passage <NUM> is formed between the second cooling plate <NUM> and the first cooling plate <NUM>. The second cooling plate <NUM> comprises a second bent part <NUM>. The second bent part <NUM> corresponds to the first bent part <NUM>. The at least one reinforcement member <NUM> is disposed in the cooling flow passage <NUM> between the first bent part <NUM> and the second bent part <NUM>.

An independent battery module usually contains multiple cells. During the charging and discharging process of the battery module, the chemical reactions of the multiple cells inside the battery module will generate a large amount of heat. Currently, a liquid cooling plate is often used to exchange heat with the battery module. However, at present, a battery pack is usually composed of multiple battery modules so as to form a high-power battery, and when the liquid cooling plate is used to exchange heat with the multiple battery modules, it is often necessary to perform bending process on the liquid cooling plate to increase the heat exchange area between the liquid cooling plate and the battery modules and improve the efficiency of the heat exchange between the liquid cooling plate and the battery modules. When the liquid cooling plate is bent, however, a flow passage at the bent part is easy to deform, causing the flow passage at the bend to crack.

In the liquid cooling plate <NUM> of the present disclosure, at least one reinforcement member <NUM> is provided between the first bent part <NUM> of the first cooling plate <NUM> and the second bent part <NUM> of the second cooling plate <NUM>. The at least one reinforcement member <NUM> can provide supporting force for side walls of the cooling flow passage <NUM> between the first bent part <NUM> and the second bent part <NUM>, thereby preventing the cooling flow passage <NUM> at the bent part from deforming and breaking, and ensuring the consistency of the cooling flow passage <NUM>.

Referring to <FIG>, the first cooling plate <NUM> and the second cooling plate <NUM> are a pair of components, and the number of the first cooling plates <NUM> is consistent with the number of the second cooling plates <NUM>. The first cooling plate <NUM> and the second cooling plate <NUM> are together formed with an accommodating space <NUM>, the accommodating space <NUM> is used to place the battery modules <NUM> therein, and the cooling flow passage <NUM> surrounds the accommodating space <NUM>. Specifically, the second cooling plate <NUM> is arranged side by side with the first cooling plate <NUM> on a side of the first cooling plate <NUM> closer to the accommodating space <NUM>.

The number of the first cooling plates <NUM> and the number of the second cooling plates <NUM> may be one or more so as to perform heat exchange for a larger number of battery modules <NUM>.

The first cooling plate <NUM> and the second cooling plate <NUM> are of the same material, which can be a metal material, or a non-metallic material with good thermal conductivity. The specific material is not limited herein. In an example, the first cooling plate <NUM> and the second cooling plate <NUM> can be made of aluminum, which can reduce the weight of the liquid cooling plate <NUM>, thereby reducing the overall weight of the battery pack <NUM>.

Please refer to <FIG> and <FIG>. In an embodiment, a passage <NUM> is formed in the reinforcement member <NUM>. The passage <NUM> penetrates the reinforcement member <NUM> along the extension direction of the cooling flow passage <NUM> and is communicated with the cooling flow passage <NUM>.

In an example, the reinforcement member <NUM> may be made of metal material, thereby increasing the strength of the reinforcement member <NUM>.

The reinforcement member <NUM> can be fixedly installed on the side wall of the first bent part <NUM> through welding connection, and then the second cooling plate <NUM> is connected with the first cooling plate <NUM> through welding connection in a sealed manner; or the reinforcement member <NUM> is fixedly installed on the side wall of the second bent part <NUM> through welding connection, and then the second cooling plate <NUM> is connected with the first cooling plate <NUM> through welding connection in a sealed manner.

Specifically, the reinforcement member <NUM> has an arc-shaped structure as a whole, and a curvature in which the reinforcement member <NUM> is bent is the same as the curvature in which the first bent part <NUM> is bent and the curvature in which the second bent part <NUM> is bent, so that when the reinforcement member <NUM> is disposed in the cooling flow passage <NUM> between the first bent part <NUM> and the second bent part <NUM>, the side surfaces of the reinforcement member <NUM> can be attached to the side walls on both sides of the cooling flow passage <NUM>, thereby providing support force for the cooling flow passage <NUM> between the first bent part <NUM> and the second bent part <NUM>, preventing the side walls of the cooling flow passage <NUM> between the first bent part <NUM> and the second bent part <NUM> from deforming and breaking, ensuring the consistency of the cooling flow passage <NUM>, and ensuring the safety of the liquid cooling plate <NUM>.

By providing the passage <NUM>, it ensures the smoothness of the cooling flow passage <NUM> after the reinforcement member <NUM> is added. When the heat exchange medium in the cooling flow passage <NUM> flows through the reinforcement member <NUM> between the first bent part <NUM> and the second bent part <NUM>, the heat exchange medium can flow into the remaining of the cooling flow passage <NUM> through the passage <NUM> of the reinforcement member <NUM>.

The number of passages <NUM> is one, as shown in <FIG>. The height of the passage <NUM> (the height refers to the distance extending in the Y direction shown in <FIG>) is within a preset range of the height of the reinforcement member <NUM>. For example, the height of the passage <NUM> is <NUM>% to <NUM>% of the height of the reinforcement member <NUM>, if the height of the reinforcement <NUM> is noted as H, the height of the passage <NUM> can be <NUM>%H, <NUM>%H, <NUM>%H, <NUM>%H, <NUM>%, <NUM>%H, <NUM>%H, <NUM>%H, <NUM>%H, <NUM>%H, or <NUM>%H, thereby keeping the volumes of the heat exchange medium before and after flowing through the reinforcement <NUM> as consistent as possible to avoid the large lateral impact force generated by the heat exchange medium at the bent part due to the large change in flow rate, thereby preventing the first bent part <NUM> of the first cooling plate <NUM> from breaking. In addition, it can also improve the cooling or preheating efficiency of the battery modules <NUM> by the liquid cooling plate <NUM>.

Please refer to <FIG> and <FIG>. In another embodiment, the number of passages <NUM> may be multiple. The multiple passages <NUM> are arranged side by side in the Y direction, and the cross-sectional projection of the reinforcement member <NUM> is square-wave-shaped. The side walls of two of the passages <NUM> are respectively attached to the first bent part <NUM> of the first cooling plate <NUM>, and the side walls of the passage <NUM> located in the middle position are attached to the second bent part <NUM> of the second cooling plate <NUM>. In this way, the thickness of the first cooling plate <NUM> at the first bent part <NUM> (the distance extended in the X direction as shown in <FIG>) is increased, which prevents the first bent part <NUM> of the first cooling plate <NUM> from breaking due to a too large lateral impact force generated by the heat exchange medium when flowing through passage <NUM>.

Please refer to <FIG>. In another embodiment, the reinforcement member <NUM> further comprises a plurality of spacer sheets <NUM>. The plurality of spacer sheets <NUM> are disposed in the passage <NUM> along the extension direction of the passage <NUM> and divide the passage <NUM> into a plurality of sub passages <NUM>, and the plurality of sub passages <NUM> are all communicated with the cooling flow passage <NUM> (shown in <FIG>).

The spacer sheets <NUM> may be metal reinforcement ribs, thereby effectively preventing the spacer sheets <NUM> from breaking due to the spacer sheets <NUM> being impacted by the heat exchange medium for a long time.

For example, as shown in <FIG>, a plurality of spacer sheets <NUM> can be arranged side by side and in parallel in the height direction of the reinforcement member <NUM> (the Y direction shown in <FIG>), and the intervals between two adjacent spacer sheets <NUM> are the same, so that the passage <NUM> is divided into a plurality of sub passages <NUM> in the height direction. In this way, the entire side wall of the passage <NUM> can be attached to the side wall of the first bent part <NUM>. Compared with the reinforcement member <NUM> described in the previous embodiment, the reinforcement member <NUM> in the present embodiment can allow the first cooling plate <NUM> as a whole to be thickened at the first bent part <NUM>, and the lateral impact force generated by the heat exchange medium when flowing through the plurality of sub passages <NUM> can all be forced on the first side of the reinforcement member <NUM> to prevent the heat exchange medium from directly impacting the first cooling plate <NUM>, thereby avoiding the crack of the first cooling plate <NUM> at the first bent part <NUM>, and effectively increasing the service life of the first cooling plate <NUM>.

For another example, as shown in <FIG>, the plurality of spacer sheets <NUM> are arranged side by side in the passage <NUM> in the height direction of the passage <NUM>, the plurality of spacer sheets <NUM> are divided into multiple groups, each group comprises two spacer sheets <NUM>. The two spacer sheets <NUM> of each group are arranged in a V shape in the passage <NUM>, and the spacer sheets <NUM> in different groups are not connected with each other.

For another example, as shown in <FIG>, the plurality of spacer sheets <NUM> are arranged side by side in the passage <NUM> in the height direction of the passage <NUM>. Except for the two spacer sheets <NUM> located outermost in the height direction of the passage <NUM>, the remaining spacer sheets <NUM> are connected end to end, so that four adjacent spacers <NUM> form an M shape.

Please refer to <FIG>. In yet another embodiment, the reinforcement member <NUM> comprises a first sub-part <NUM>, a second sub-part <NUM> and at least one third sub-part <NUM>. The first sub-part <NUM> and the second sub-part <NUM> are arranged oppositely, and two ends of the at least one third sub-part <NUM> are connected with the first sub-part <NUM> and the second sub-part <NUM> respectively. The at least one third sub-part <NUM> divides the passage <NUM> into at least two sub passages <NUM>. The number of the third sub-parts <NUM> may be one or more. When the number of the third sub-parts <NUM> is one, the structure of the reinforcement member <NUM> is as shown in <FIG>. When the number of third sub-parts <NUM> is multiple, the multiple third sub-parts <NUM> are arranged in parallel between the first sub-part <NUM> and the second sub-part <NUM>, dividing the passage <NUM> into a plurality of sub passages <NUM>.

Please refer to <FIG>. In another embodiment, the reinforcement member <NUM> may be made of foam metal. The foam metal is formed with a plurality of air holes <NUM>, and the plurality of air holes <NUM> are communicated with the cooling flow passage <NUM> to allow the heat exchange medium in the cooling flow passage <NUM> to pass through. The heat exchange medium can enter the cooling flow passage <NUM> through the plurality of air holes <NUM>. The foam metal is arranged between the first bent part <NUM> and the second bent part <NUM>, which can slow down the flow rate of the heat exchange medium flowing through the reinforcement member <NUM>, thereby reducing the lateral impact force generated by the heat exchange medium when flowing through the reinforcement member <NUM>, and avoiding cracking of the first bent part <NUM> of the first cooling plate <NUM>.

The heat exchange medium comprises a liquid (such as water, water-alcohol mixture) medium. For example, in an example, the heat exchange medium may be water.

Referring to <FIG> and <FIG>, it should be noted that the heat exchange medium can cool or preheat the battery modules <NUM>. When the battery modules <NUM> need to be heat exchanged, the heat exchange medium is input into the cooling flow passage <NUM>. Since the battery modules <NUM> are attached to the liquid cooling plate <NUM>, the heat exchange medium in the cooling flow passage <NUM> can perform heat exchange through the liquid cooling plate <NUM>. The battery modules <NUM> can be cooled or preheated by adjusting the temperature of the input heat exchange medium.

In some embodiments, in a low-temperature environment, the battery modules <NUM> have reduced charging and discharging performance due to the reduced activity of positive and negative electrode materials and the reduced conductivity of the electrolyte of the battery cells in the battery modules <NUM>. In this case, it needs to introduce the heat exchange medium with higher temperature into the cooling flow passage <NUM> so as to allow the battery modules <NUM> to reach a suitable temperature. At the same time, the liquid cooling plate <NUM> can be attached to multiple battery modules <NUM>, so that the liquid cooling plate <NUM> can exchange heat with the multiple battery modules <NUM>, effectively improving the preheating efficiency of the liquid cooling plate <NUM> for the battery pack <NUM>.

In some embodiments, in a high-temperature environment, the charging efficiency of the cells in the battery modules <NUM> will be low and the battery capacity will be reduced, and the battery modules <NUM> will dissipate heat during operation, resulting in the temperature of the battery modules <NUM> too high, and thus the heat of the battery modules <NUM> needs to be dissipated through the liquid cooling plate <NUM>. In this case, it needs to introduce the heat exchange medium with a lower temperature into the cooling flow passage <NUM> so that the heat exchange medium in the cooling flow passage <NUM> can take away the heat dissipated by the battery module <NUM> to allow the temperature of the battery module <NUM> to be reduced to a suitable temperature. At the same time, the liquid cooling plate <NUM> is attached to multiple battery modules <NUM>, so that the liquid cooling plate <NUM> can exchange heat with the multiple battery modules <NUM> at the same time, effectively improving the cooling efficiency of the liquid cooling plate <NUM> for the battery pack <NUM>.

In an embodiment of the present disclosure, multiple columns of battery modules <NUM> are placed in the accommodating space <NUM> so that the liquid cooling plate <NUM> is attached to the multiple columns of battery modules <NUM>, thereby improving the cooling efficiency of the liquid cooling plate <NUM> for the battery modules <NUM>.

Please refer to <FIG> and <FIG>. In an embodiment, the first cooling plate <NUM> comprises a first body <NUM> and a first flow passage <NUM> provided on the first body <NUM>. The first flow passage <NUM> extends along the length direction of the first body <NUM> and is formed by recessing from the first body <NUM> in a direction away from the accommodating space <NUM>. The second cooling plate <NUM> is connected with the first body <NUM> in a sealed manner, and the first flow passage <NUM> and the second cooling plate <NUM> are matched to form the cooling flow passage <NUM> surrounding the accommodating space <NUM>.

The first flow passage <NUM> comprises a first sub flow passage <NUM> and a second sub flow passage <NUM> distributed in the first body <NUM>. The first sub flow passage <NUM> and the second sub flow passage <NUM> are communicated with each other, and the connected first sub flow passage <NUM> and second sub flow passage <NUM> together form the first flow passage <NUM> in an annular shape. The first sub flow passage <NUM> and the second sub flow passage <NUM> are connected at the ends <NUM> of the first body <NUM>, and other part of the first sub flow passage <NUM> and other part of the second sub flow passage <NUM> are arranged in parallel at intervals in the height direction Y of the first body <NUM>, that is, the interval part space therebetween is not provided with any flow passage. In addition, the first flow passage <NUM> is not provided on the peripheral edge portion of the first body <NUM>, and the portion of the first body <NUM> that is not provided with the first flow passage <NUM> is used to abut against the second cooling plate <NUM>.

The surface of the second cooling plate <NUM> is flat. In this case, the cooling flow passage <NUM> of the liquid cooling plate <NUM> is the first flow passage <NUM>. The peripheral edge portion of the first body <NUM> that is not provided with the first flow passage <NUM> abuts against the second cooling plate <NUM>, and the interval part between the first sub flow passage <NUM> and the second sub flow passage <NUM> abuts against the second cooling plate <NUM>. The first body <NUM> and the second cooling plate <NUM> are fixedly connected by welding, and the first flow passage <NUM> on the first body <NUM> is sealed, which can effectively prevent the cooling medium in the first flow passage <NUM> from leaking.

Referring to <FIG> and <FIG>, in another embodiment, the second cooling plate <NUM> comprises a second body <NUM> and a second flow passage <NUM> provided in the second body <NUM>. The second body <NUM> is arranged side by side with the first body <NUM> on the side of the first body <NUM> facing the accommodating space <NUM>. The second flow passage <NUM> extends along the length direction of the second body <NUM> and is formed by recessing from the second body <NUM> in a direction toward the accommodating space <NUM>. The second flow passage <NUM> corresponds to the first flow passage <NUM>, and the width of the second flow passage <NUM> is equal to the width of the first flow passage <NUM>. In a case where the first body <NUM> and the second body <NUM> are connected with each other in a sealed manner, the second flow passage <NUM> and the second flow passage <NUM> are matched to jointly form the cooling flow passage <NUM> surrounding the accommodating space <NUM>.

Similarly, the first flow passage <NUM> comprises a first sub flow passage <NUM> and a second sub flow passage <NUM> distributed in the first body <NUM>. The first sub flow passage <NUM> and the second sub flow passage <NUM> are communicated with each other, and the connected first sub flow passage <NUM> and second sub flow passage <NUM> together form the first flow passage <NUM> in an annular shape.

Specifically, the first sub flow passage <NUM> and the second sub flow passage <NUM> are connected at the ends <NUM> of the first body <NUM>, and the other part of the first sub flow passage <NUM> and the other part of the second sub flow passage <NUM> are arranged in parallel at intervals in the height direction Y, that is, the interval part spaced therebetween is not provided with any flow passage. The second flow passage <NUM> comprises a third sub flow passage <NUM> and a fourth sub flow passage <NUM> distributed in the second body <NUM>. The third sub flow passage <NUM> and the fourth sub flow passage <NUM> are communicated with each other, and the connected third sub flow passage <NUM> and fourth sub flow passage <NUM> together form the second flow passage <NUM> in an annular shape. Therefore, the cooling flow passage <NUM> formed jointly by the matched first passage <NUM> and second passage <NUM> is in an annular shape as a whole. Similarly, the third sub flow passage <NUM> and the fourth sub flow passage <NUM> are connected at the ends <NUM> of the second body <NUM>, and the other part of the third sub flow passage <NUM> and the other part of the fourth sub flow passage <NUM> are arranged in parallel at intervals in the height direction Y. As such, one of the sub flow passages (for example, the first sub flow passage <NUM> or the third sub flow passage <NUM>) can be used to be connected with a liquid inlet pipe <NUM> to input heat exchange medium into the flow passage, and another one of the sub flow passages (such as the second sub flow passage <NUM> or the fourth sub flow passage <NUM>) can be used to connect the heat exchange medium after heat exchange to a liquid outlet pipe <NUM> to discharge it out of the cooling flow passage <NUM>. There is no flow passage provided in the interval part, and the interval part between the third sub flow passage <NUM> and the fourth sub flow passage <NUM> and the interval part between the first sub flow passage <NUM> and the second sub flow passage <NUM> abut against each other.

The first flow passage <NUM> and the second flow passage <NUM> being matched to form the cooling flow passage <NUM> means that when the first body <NUM> and the second body <NUM> are attached and welded to each other to form the liquid cooling plate <NUM>, the part of the first body <NUM> that is not provided with the first flow passage <NUM> and the part of the second body <NUM> that is not provided with the second flow passage <NUM> abut against each other, the first flow passage <NUM> and the second flow passage <NUM> are opposite in the thickness direction of the liquid cooling plate <NUM>, and the first flow passage <NUM> and the second flow passage <NUM> together form the cooling flow passage <NUM>.

Specifically, the first flow passage <NUM> is not provided on the peripheral edge of the first body <NUM>, and the second flow passage <NUM> is not provided on the peripheral edge of the second body <NUM>. When the first body <NUM> and the second body <NUM> are welded, the peripheral edge of the first body <NUM> and the peripheral edge of the second body <NUM> can be welded so that the first body <NUM> and the second body <NUM> are connected in a sealed manner, and thus first flow passage <NUM> and the second flow passage <NUM> are sealed, which can effectively prevent the heat exchange medium in the first flow passage <NUM> from leaking.

Alternatively, when the peripheral edges of the first body <NUM> and the second body <NUM> are weld, the interval part between the third sub flow passage <NUM> and the fourth sub flow passage <NUM> and the interval part between the first sub flow passage <NUM> and the second sub flow passage <NUM> can also abut against each other and then welded with each other so as to strengthen the stability of the welding between the first cooling plate <NUM> and the second cooling plate <NUM>.

Compared with the cooling flow passage <NUM> formed by the first flow passage <NUM>, the cooling flow passage <NUM> jointly formed by the matched second flow passage <NUM> and first flow passage <NUM>, with the addition of the second flow passage <NUM>, results in a larger volume of the cooling flow passage <NUM>, and more heat exchange medium can be input into the cooling flow passage <NUM> at one time, which effectively improves the heat exchange efficiency between the heat exchange medium and the battery modules <NUM>. In the present disclosure, the structure of the liquid cooling plate <NUM> is described in detail in an example where the first cooling plate <NUM> is formed with the first flow passage <NUM> and the second cooling plate <NUM> is formed with the second flow passage <NUM>.

In an embodiment of the present disclosure, a width of the second flow passage <NUM> is equal to a width of the first flow passage <NUM>. When the first body <NUM> and the second body <NUM> are opposite and attached to each other, the side wall of the first flow passage <NUM> can abut against the side wall of the second flow passage <NUM>, sealing the first flow passage <NUM> and the second flow passage <NUM>.

Please refer to <FIG>, the first cooling plate <NUM> further comprises a first flow disturbing part <NUM> provided on the first flow passage <NUM> along the extension direction of the first flow passage <NUM>. The first flow disturbing part <NUM> is formed to protrude from the side wall of the first flow passage <NUM> in the direction toward the accommodating space <NUM>.

The number of first flow disturbing parts <NUM> is multiple, and the multiple first flow disturbing parts <NUM> may be evenly distributed on the side wall of the first flow passage <NUM>, or the multiple first flow disturbing parts <NUM> may be unevenly spaced on the side wall of the first flow passage <NUM>. By providing the first flow disturbing parts <NUM>, the heat exchange medium input into the first flow passage <NUM> can be diverted, which increases the flow path of the heat exchange medium in the first flow passage <NUM>, and effectively prolongs the time duration of the heat exchange between the heat exchange medium and the battery modules <NUM>, thereby achieving higher heat exchange efficiency.

The first flow disturbing part <NUM> has a hemispherical structure. When the heat exchange medium in the first flow passage <NUM> passes the surface of the first flow disturbing part <NUM>, the heat exchange medium can flow around the first flow disturbing part <NUM>, so as to form a reverse flow around the first flow disturbing part <NUM>, prolonging the time duration of the heat exchange between the heat exchange medium and the battery modules <NUM>, thereby improving the heat exchange efficiency.

Similarly, the second cooling plate <NUM> also comprises a second flow disturbing part <NUM> provided on the second flow passage <NUM> along the extension direction of the second flow passage <NUM>. The second spoiler <NUM> is formed to protrude from the side wall of the second flow passage <NUM> in a direction away from the accommodating space <NUM>. The structure of the second flow disturbing part <NUM> is the same as that of the first flow disturbing part <NUM>. The number of the second flow disturbing parts <NUM> is the same as the number of the first flow disturbing parts <NUM>, which will not be described again.

In an embodiment, when the first body <NUM> and the second body <NUM> are connected in a sealed manner, the first flow disturbing parts <NUM> and the second flow disturbing parts <NUM> may be arranged to be staggered, and the first flow disturbing parts <NUM> and the second flow disturbing parts <NUM> are both used to divert the heat exchange medium in the cooling flow passage <NUM> so as to increase the fluidity of the heat exchange medium in the flow passage <NUM>, thereby improving the heat exchange efficiency between the heat exchange medium and the battery modules <NUM>.

In another embodiment, when the first body <NUM> and the second body <NUM> are connected in a sealed manner, the first flow disturbing parts <NUM> and the second flow disturbing parts <NUM> abut against each other.

The depth that the first flow passage <NUM> is recessed is equal to the height that the first flow disturbing part <NUM> protrudes, and the depth that the second flow passage <NUM> is recessed is equal to the height that the second flow disturbing part <NUM> protrudes. Therefore, when the peripheral edge surface of the first body <NUM> and the peripheral edge surface of the second body <NUM> are welded, both of the first flow disturbing parts <NUM> and the second flow disturbing parts <NUM> will not affect the sealing of the connection between the first body <NUM> and the second body <NUM>, ensuring the sealing of the connection between the first body <NUM> and the second body <NUM>.

Referring to <FIG>, the first body <NUM> comprises a first segment <NUM>, two first bent parts <NUM>, a second segment <NUM> and a third segment <NUM>. Two ends of one of the first bent parts <NUM> are connected with the first segment <NUM> and the second segment <NUM> respectively, and two ends of the other first bent part <NUM> are connected with the third segment <NUM> and the second segment <NUM> respectively. The second segment <NUM> is located between the first segment <NUM> and the third segment <NUM>.

In an embodiment of the present disclosure, the first segment <NUM>, the two first bent parts <NUM>, the second segment <NUM> and the third segment <NUM> are of an integral structure, and the first body <NUM> is obtained through stamping and bending process using a profiling mold. The first segment <NUM>, the two first bent parts <NUM>, the second segment <NUM> and the third segment <NUM> are connected without a connecting structure such as a quick-connect connector, and there is no interface for connection through a quick-connect connector between the three, and there is no leakage failure of the heat exchange medium in the first flow passage <NUM>, so that the liquid cooling plate <NUM> has high safety performance. Moreover, the first segment <NUM>, the two first bent parts <NUM>, the second segment <NUM> and the third segment <NUM> do not need any connection structure such as quick-plug connectors for connection, which can effectively reduce the cost.

Please refer to <FIG>. The first segment <NUM>, the two first bent parts <NUM>, the second segment <NUM> and the third segment <NUM> connected in sequence form a U-shaped structure. The first segment <NUM> and the third segment <NUM> are opposite. The length of the first segment <NUM> and the length of the third segment <NUM> can be set according to the length of the battery module <NUM>. Specifically, the length of the first segment <NUM> and the length of the third segment <NUM> are slightly larger than the length of one column of battery modules <NUM>. The second segment <NUM> corresponds to the width of the two columns of battery modules <NUM>, and the length of the second segment <NUM> is slightly larger than the width of the battery modules <NUM>, ensuring that two columns of battery modules <NUM> can be placed in the accommodating space <NUM>.

Referring to <FIG> and <FIG>, similarly, the second body <NUM> comprises a fourth segment <NUM>, two second bent parts <NUM>, a fifth segment <NUM> and a sixth segment <NUM>. The fourth segment <NUM> corresponds to the first segment <NUM> and is matched and connected with the first segment <NUM>. Two ends of one of the two second bent parts <NUM> are respectively connected with the fifth segment <NUM> and the fourth segment <NUM>, and the fifth segment <NUM> corresponds to and is matched and connected with the second segment <NUM>. Two ends of the other one of the two second bent parts <NUM> are respectively connected with the sixth segment <NUM> and the fifth segment <NUM>. The sixth segment <NUM> corresponds to and is matched and connected with the third segment <NUM>. The fifth segment <NUM> is located between the fourth segment <NUM> and sixth segment <NUM>.

In an embodiment of the present disclosure, the fourth segment <NUM>, the two second bent parts <NUM>, the fifth segment <NUM> and the sixth segment <NUM> are of an integral structure, and the second body <NUM> is obtained through stamping and bending process using a profiling mold. The fourth segment <NUM>, the two second bent parts <NUM>, the fifth segment <NUM> and the sixth segment <NUM> do not need to be connected through a connection structure such as a quick-connect connector, there is no interface for connection through a quick connector between the three, and there is no leakage failure of the heat exchange medium in the first flow passage <NUM>, so that the liquid cooling plate <NUM> has high safety performance. Moreover, the fourth segment <NUM>, the two second bent parts <NUM>, the fifth segment <NUM>, and the sixth segment <NUM> do not need a connection structure such as a quick-plug connector for connection, which can effectively reduce the cost.

Please refer to <FIG>, the fourth segment <NUM>, the two second bent parts <NUM>, the fifth segment <NUM> and the sixth segment <NUM> connected in sequence form a U-shaped structure. The fourth segment <NUM> and the sixth segment <NUM> are opposite. The length of the fourth segment <NUM> and the length of the sixth segment <NUM> can be set according to the length of a column of battery modules <NUM> and can be equal to the length of the first segment <NUM> and the length of the third segment <NUM> respectively. Specifically, the length of the fourth segment <NUM> and the length of the sixth segment <NUM> are both slightly larger than the length of the battery modules <NUM>. The fifth segment <NUM> corresponds to the width of the two columns of battery modules <NUM>, and the length of the fifth segment <NUM> is greater than the width of the two columns of battery modules <NUM>, ensuring that the two columns of battery modules <NUM> can be placed in the accommodating space <NUM>.

It should be noted that the first segment <NUM>, the two first bent parts <NUM>, the second segment <NUM>, and the third segment <NUM> may be in separate structures. The first segment <NUM>, the two first bent parts <NUM>, the second segment <NUM>, and the third segment <NUM> are connected by welding. Similarly, the fourth segment <NUM>, the two second bent parts <NUM>, the fifth segment <NUM>, and the sixth segment <NUM> may be in separate structures. The fourth segment <NUM>, the two second bent parts <NUM>, the fifth segment <NUM> and the sixth segment <NUM> are connected by welding. Specifically, when the first body <NUM> and the second body <NUM> are welded to form the liquid cooling plate <NUM>, the first segment <NUM> and the fourth segment <NUM> are attached to each other, the first bent part <NUM> and the second bent part <NUM> are attached to each other, the second segment <NUM> and the fifth segment <NUM> are attached to each other, and the third segment <NUM> and the sixth segment <NUM> are attached to each other. When the liquid cooling plate <NUM> exchanges heat with the four columns of battery modules <NUM>, the first segment <NUM> and the fourth segment <NUM> are respectively located between the third column of battery modules <NUM> and the fourth column of battery modules <NUM>, and the first segment <NUM> and the fourth segment <NUM> are used to exchange heat with the third column of battery modules <NUM> and the fourth column of battery modules <NUM>. The third segment <NUM> and the sixth segment <NUM> are located between the first column of battery modules <NUM> and the second column of battery modules <NUM>, and the third segment <NUM> and the sixth segment <NUM> are used to exchange heat with the first column of battery modules <NUM> and the second column of battery modules <NUM>. When the heat exchange medium is introduced into the cooling flow passage <NUM>, the heat dissipated by the four columns of battery modules <NUM> is exchanged with the heat exchange medium in the cooling flow passage <NUM> through the first segment <NUM>, the fourth segment <NUM>, the third segment <NUM> and the sixth segment <NUM>.

In an embodiment of the present disclosure, the number of the first flow disturbing parts <NUM> on the first segment <NUM> and the third segment <NUM> is greater than the number of the first flow disturbing parts <NUM> on the second segment <NUM>, and the number of the second flow disturbing parts <NUM> on the fourth segment <NUM> and the sixth segment <NUM> is greater than the number of the second flow disturbing parts <NUM> on the fifth segment <NUM>, ensuring a longer time duration of the heat exchange between the heat exchange medium in the cooling flow passage <NUM> of the liquid cooling plate <NUM> and the battery modules <NUM>, thereby improving the heat exchange efficiency.

Please continue to refer to <FIG>. The first sub flow passage <NUM> and the second sub flow passage <NUM> extend through the first segment <NUM>, the second segment <NUM> and the third segment <NUM>. The third sub flow passage <NUM> and the fourth sub flow passage <NUM> extend through the fourth segment <NUM>, the fifth segment <NUM> and the sixth segment <NUM>. The first sub flow passage <NUM> corresponds to the third sub flow passage <NUM>, the width of the first sub flow passage <NUM> is equal to the width of the third sub flow passage <NUM>, the second sub flow passage <NUM> corresponds to the fourth sub flow passage <NUM>, and the width of the second sub flow passage <NUM> is equal to the width of the fourth sub flow passage <NUM>.

Please refer to <FIG>. In an embodiment of the present disclosure, the number of reinforcement members <NUM> is multiple. The multiple reinforcement members <NUM> are disposed in the first sub flow passage <NUM> and the third sub flow passage <NUM> between the first bent part <NUM> and the second bent part <NUM>, and the multiple reinforcement members <NUM> are disposed in the second sub flow passage <NUM> and the fourth sub flow passage <NUM> between the first bent part <NUM> and the second bent part <NUM>.

The width of the first sub flow passage <NUM> at the first segment <NUM> and the width of the first sub flow passage <NUM> at the third segment <NUM> are both greater than or equal to the width of the first sub flow passage <NUM> at the second segment <NUM>. The width of the second sub flow passage <NUM> of the first segment <NUM> and the width of the second sub flow passage <NUM> of the third segment <NUM> are both greater than or equal to the width of the second sub flow passage <NUM> of the second segment <NUM>. The width of the first sub flow passage <NUM> at the first segment <NUM> and the width of the first sub flow passage <NUM> at the third segment <NUM> are both greater than or equal to the width of the first sub flow passage <NUM> at the first bent part <NUM>. The width of the second sub flow passage <NUM> at the first segment <NUM> and the width of the second sub flow passage <NUM> at the third segment <NUM> are both greater than or equal to the width of the second sub flow passage <NUM> at the first bent part <NUM>. In the present disclosure, the first sub flow passage <NUM> and the second sub flow passage <NUM> with a larger width are provided in the part where the first cooling plate <NUM> and the battery module <NUM> (shown in <FIG>) have a larger contact area, which can effectively improve the heat exchange efficiency.

The width of the third sub flow passage <NUM> of the fourth segment <NUM> and the width of the third sub flow passage <NUM> of the sixth segment <NUM> are both greater than or equal to the width of the third sub flow passage <NUM> of the fifth segment <NUM>. The width of the fourth sub flow passage <NUM> of the fourth segment <NUM> and the width of the fourth sub flow passage <NUM> of the sixth segment <NUM> are both greater than or equal to the width of the fourth sub flow passage <NUM> of the fifth segment <NUM>. The width of the third sub flow passage <NUM> of the fourth segment <NUM> and the width of the third sub flow passage <NUM> of the sixth segment <NUM> are both greater than or equal to the width of the third sub flow passage <NUM> of the second bent part <NUM>. The width of the fourth sub flow passage <NUM> of the fourth segment <NUM> and the width of the fourth sub flow passage <NUM> of the sixth segment <NUM> are both greater than or equal to the width of the fourth sub flow passage <NUM> of the second bent part <NUM>. In the present disclosure, the third sub flow passage <NUM> and the fourth sub flow passage <NUM> with a larger width are provided in the part where the second cooling plate <NUM> has a larger contact area with the battery modules <NUM>, which can effectively improve the heat exchange efficiency.

It should be noted that the width of each of the sub flow passages mentioned above refers to the length of the sub flow passage extending in the Y direction shown in <FIG>.

Please refer to <FIG>. In an embodiment, the second segment <NUM> is provided with a first through-hole <NUM> connected with the first sub flow passage <NUM>, and the second segment <NUM> is provided with a second through-hole <NUM> connected with the second sub flow passage <NUM>. The first through-hole <NUM> is used to connect one of the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM>, and the second through-hole <NUM> is used to connect the other of the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM>. For example, the first through-hole <NUM> is used to connect the liquid inlet pipe <NUM>, and the second through-hole <NUM> is used to connect the liquid outlet pipe <NUM>. In this case, when the heat exchange medium is input into the liquid inlet pipe <NUM>, the heat exchange medium flows into the sub flow passage formed by the first sub flow passage <NUM> and the third sub flow passage <NUM> through the first through-hole <NUM>, and then flows into the sub flow passage jointly formed by the second sub flow passage <NUM> and the fourth sub flow passage <NUM>, and is finally discharged from the liquid outlet pipe <NUM> connected to the second through-hole <NUM>. In this embodiment, in the Y direction, the center of the first through-hole <NUM> and the center of the second through-hole <NUM> are located on a straight line; or, in the Y direction, the center of the first through-hole <NUM> and the center of the second through-hole <NUM> are located on different straight lines.

Please refer to <FIG>. In another embodiment, the fifth segment <NUM> is provided with a first through-hole <NUM> connected with the third sub flow passage <NUM>, and the fifth segment <NUM> is provided with a second through-hole <NUM> connected with the fourth sub flow passage <NUM>. The first through-hole <NUM> is used to connect one of the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM>, and the second through-hole <NUM> is used to connect the other of the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM>. The present embodiment differs from the above-mentioned embodiments in that the first through-hole <NUM> and the second through-hole <NUM> are provided on the fifth segment <NUM> of the second body <NUM>. In this case, the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM> extend into the accommodating space <NUM> from the bottom of the liquid cooling plate <NUM> and are connected with the first through-hole <NUM> and the second through-hole <NUM>.

Please refer to <FIG>. In yet another embodiment, the first cooling plate <NUM> further comprises a first connection part <NUM> and a second connection part <NUM> disposed on the second segment <NUM>. The first connection part <NUM> is spaced apart from the second connection part <NUM>. The first connection part <NUM> is provided with a first opening <NUM>. The second connection part <NUM> is provided with a third flow passage <NUM> connected with the first sub flow passage <NUM>. The third flow passage <NUM> is formed by recessing from the second connection part <NUM> in a direction away from the accommodating space <NUM>. The second connection part <NUM> is provided with a second opening <NUM> that is connected with the third flow passage <NUM>.

The second cooling plate <NUM> further comprises a third connection part <NUM> and a fourth connection part <NUM> provided on the fifth segment <NUM>. The third connection part <NUM> is spaced apart from the fourth connection part <NUM>, the third connection part <NUM> is matched with the first connection part <NUM>, and the fourth connection part <NUM> is matched with the second connection part <NUM>. The third connection part <NUM> is provided with a third opening <NUM>, and the third opening <NUM> corresponds to the first opening <NUM>. The fourth connection part <NUM> is provided with a fourth flow passage <NUM> connected with the third sub flow passage <NUM>. The fourth flow passage <NUM> is formed by recessing from the fourth connection part <NUM> in the direction toward the accommodating space <NUM>. The fourth flow passage <NUM> corresponds to and is matched with the third flow passage <NUM> to form a branch flow passage communicated with the cooling flow passage <NUM>, and the branch flow passage is used to be connected with the liquid inlet pipe <NUM> or the liquid outlet pipe <NUM>.

By providing the first connection part <NUM>, the second connection part <NUM>, the third connection part <NUM> and the fourth connection part <NUM>, the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM> can extend out at the same height.

Specifically, the fifth segment <NUM> is provided with a first through-hole <NUM> connected with the fourth sub flow passage <NUM>. When the first cooling plate <NUM> and the second cooling plate <NUM> are connected in a sealed manner, the first opening <NUM> and the third opening <NUM> are coaxially arranged. The first through-hole <NUM>, the first opening <NUM> and the third opening <NUM> are jointly used to connect one of the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM>, and the second opening <NUM> is used to connect the other of the liquid inlet pipe <NUM> and the liquid outlet pipe <NUM>. For example, the first through-hole <NUM>, the first opening <NUM> and the third opening <NUM> are jointly used to connect the liquid inlet pipe <NUM>, and the second opening <NUM> is used to connect the liquid outlet pipe <NUM>. The liquid inlet pipe <NUM> has a U-shaped structure, one end of the liquid inlet pipe <NUM> is connected with the first through-hole <NUM>, and the other end of the liquid inlet pipe <NUM> extends out from the accommodating space <NUM> to be connected to the first opening <NUM> and the third opening <NUM>. The liquid outlet pipe <NUM> is connected to the second opening <NUM>, and connected with the third flow passage <NUM> and the fourth flow passage <NUM>.

Please refer to <FIG> and <FIG>, in an embodiment of the present disclosure, there is also provided a battery pack <NUM>. The battery pack <NUM> comprises at least one battery module <NUM> and the liquid cooling plate <NUM> described in any embodiment of the present disclosure. The liquid cooling plate <NUM> is used to perform heat exchange with the at least one battery module <NUM>.

The battery pack <NUM> comprises one or more battery modules <NUM>. When multiple battery modules <NUM> are comprised, the multiple battery modules <NUM> are arranged in parallel. Each battery module <NUM> can be placed in the accommodating space <NUM> of a liquid cooling plate <NUM>. Therefore, multiple surfaces of each of the battery module <NUM> can be attached to the liquid cooling plate <NUM>, thereby increasing the heat exchange area between the battery module <NUM> and the liquid cooling plate <NUM>, and thus improving the heat exchange efficiency.

The battery pack <NUM> comprises one or more battery modules <NUM>. When multiple battery modules <NUM> are comprised, the multiple battery modules <NUM> are arranged in parallel. For example, a battery pack <NUM> comprises four columns of battery modules <NUM>. The first column of battery modules <NUM> is placed on one side of the liquid cooling plate <NUM>, the second column of battery modules <NUM> and the third column of battery modules <NUM> are both placed in the accommodating space <NUM>, and the fourth column of battery modules <NUM> is placed on the other side of the liquid cooling plate <NUM>, as shown in <FIG>. Part of the structure of the liquid cooling plate <NUM> is located between the first column of battery modules <NUM> and the second column of battery modules <NUM>, and this part of the liquid cooling plate <NUM> performs heat exchange with both the first column of battery modules <NUM> and the second column of battery modules <NUM>. Part of the structure of the liquid cooling plate <NUM> is located between the third column of battery modules <NUM> and the fourth column of battery modules <NUM>, and this part of the liquid cooling plate <NUM> performs heat exchange with both the third column of battery modules <NUM> and the fourth column of battery modules <NUM>. The heat exchange processing for the multiple battery modules <NUM> is realized through one liquid cooling plate <NUM>, which improves the heat exchange efficiency of the liquid cooling plate <NUM> with the battery pack <NUM>, and can effectively reduce the cost at the same time. Moreover, the first cooling plate <NUM> and the second cooling plate <NUM> do not need to be connected through quick-plug connectors, and thus the assembling of the liquid cooling plate <NUM> is simple.

Of course, in the battery pack <NUM>, one liquid cooling plate <NUM> can be used to exchange heat with a plurality of battery modules <NUM>. For example, when the battery pack <NUM> comprises one column of battery modules <NUM>, the column of battery modules <NUM> can be placed in the accommodating space <NUM> of the liquid cooling plate <NUM>, so that multiple surfaces of the column of battery modules <NUM> all can be attached to the liquid cooling plate <NUM>, which increases the heat exchange area between the battery modules <NUM> and the liquid cooling plate <NUM>, thereby improving the heat exchange efficiency.

The battery module <NUM> comprises a plurality of battery cells. Specifically, the battery cell may be a lead-acid battery, a nickel-metal hydride battery, a lithium battery, a lithium iron phosphate battery, or a ternary battery. The battery cell may be in the shape of a rectangular parallelepiped or a cylinder, and the shape of the battery cell is not limited here.

The battery pack <NUM> may also comprise an upper cover <NUM> and a lower box body <NUM>. The upper cover <NUM> and the lower box body <NUM> are used to encapsulate and protect the battery modules <NUM> and the liquid cooling plate <NUM>.

Claim 1:
A liquid cooling plate (<NUM>), comprising:
a first cooling plate (<NUM>), comprising a first bent part (<NUM>);
a second cooling plate (<NUM>), arranged side by side with the first cooling plate (<NUM>) and connected with the first cooling plate (<NUM>) in a sealed manner, wherein a cooling flow passage (<NUM>) is formed between the second cooling plate (<NUM>) and the first cooling plate (<NUM>), and the second cooling plate (<NUM>) comprises a second bent part (<NUM>) that corresponds to the first bent part (<NUM>); and
at least a reinforcement member (<NUM>), provided in the cooling flow passage (<NUM>) between the first bent part (<NUM>) and the second bent part (<NUM>),
characterised in that
the reinforcement member (<NUM>) has an arc-shaped structure, and a curvature in which the reinforcement member (<NUM>) is bent is the same as a curvature in which the first bent part (<NUM>) and the second bent part (<NUM>) are bent.