Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack, which has a first direction, a second direction and a third direction which are intersected pairwise, and comprises a current collector and a plurality of cooling plates, the multiple cooling plates are arranged at intervals in the first direction, the ends, in the second direction, of the cooling plates are connected with the current collector, and first cooling flow channels are formed in the cooling plates; the current collector extends along a first direction, and a plurality of current collecting cavities and barrier structures are arranged in the current collector; the multiple flow collecting cavities are arranged at intervals in the first direction, and one flow collecting cavity communicates with the first cooling flow channel in at least one cooling plate; the blocking structure is located between the two adjacent flow collecting cavities so as to separate the two adjacent flow collecting cavities. The cooling plate and the current collector are directly connected without using a pipeline, so that the number of components of the cooling device can be reduced, the number of installation procedures can be reduced, the number of connection positions can be reduced, the risk of connection failure can be reduced, and the yield of the battery pack can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a battery pack. Background Art

[0002] During the operation of the battery pack, the battery cells generate heat. To prevent the battery cells from overheating and affecting the performance and lifespan of the battery, a cooling system is usually provided to cool the battery cells.

[0003] However, there are a large number of single cells in the battery pack, and the single cells are arranged in multiple columns. Therefore, multiple cooling plates usually need to be correspondingly provided, which will lead to problems such as too many current collectors and too many pipelines. Not only are the installation procedures numerous, but also the risk of connection failure is relatively high, posing a great challenge to the reliability and safety of the battery pack. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a battery pack to solve or partially solve the technical problems of too many current collectors and pipelines in the existing battery pack, numerous installation procedures, and relatively high risk of connection failure.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] In a first aspect, an embodiment of the utility model provides a battery pack. The battery pack has a first direction, a second direction, and a third direction that intersect pairwise. The battery pack includes a current collector and a plurality of cooling plates; the plurality of cooling plates are arranged at intervals in the first direction, and the ends of the plurality of cooling plates along the second direction are connected to the current collector. A first cooling channel is provided in the cooling plate; the current collector extends along the first direction, and a plurality of current collecting chambers and a blocking structure are provided in the current collector; the plurality of current collecting chambers are arranged at intervals in the first direction, and one of the current collecting chambers is communicated with at least one first cooling channel in the cooling plate; the blocking structure is located between two adjacent current collecting chambers to separate the two adjacent current collecting chambers.

[0007] Optionally, the blocking structure is provided with a blocking chamber. The blocking chamber is located between two adjacent current collecting chambers, and the blocking chamber is disconnected from both the current collecting chamber and the first cooling channel. The blocking chamber forms the blocking structure.

[0008] Optionally, the current collector is provided with a blocking plate. The blocking plate extends along the third direction. The blocking plate is located between two adjacent current collecting chambers to disconnect the two adjacent current collecting chambers. The blocking plate forms the blocking structure.

[0009] Optionally, a plurality of current collectors are provided, and the cooling plates are connected to the current collectors at both ends along the second direction.

[0010] Optionally, at least two of the current collectors are arranged at the same end of the cooling plate along the second direction and are spaced apart along the first direction.

[0011] Optionally, the battery pack further includes an upper cover. At least one end of the cooling plate in the second direction is bent away from the upper cover to form a bent portion, and the current collector is connected to the bent portion; on the side close to the upper cover in the third direction, the current collector is flush with or lower than the cooling plate.

[0012] Optionally, the current collector is provided with a water inlet and outlet. One end of the water inlet and outlet is connected to the end of the current collector facing away from the upper cover, and the other end of the water inlet and outlet extends in a direction away from the upper cover.

[0013] Optionally, the battery pack further includes a plurality of single cells, and the plurality of single cells are arranged along the first direction and / or the second direction; the single cell is provided with a pole column, the cooling plate is located on the side of the single cell where the pole column is provided, and the cooling plate is thermally connected to the pole column.

[0014] Optionally, the battery pack further includes a plurality of busbars, the busbars are arranged along the second direction, the busbars are connected to the pole columns of at least two of the single cells, and the ends of the plurality of busbars facing away from the single cells are connected to the cooling plate.

[0015] Optionally, the length extension directions of the busbar and the cooling plate are the same, and this length extension direction is perpendicular to the surface with the largest area in the single cell.

[0016] Optionally, the battery pack further includes a box body and an upper cover. An accommodation cavity is provided in the box body, and the upper cover is connected to the box body to cover the accommodation cavity; the single cell, the cooling plate and the current collector are provided in the accommodation cavity, the single cell is connected to the box body, and the current collector is connected to the upper cover.

[0017] Optionally, the battery pack further includes a plugging member. A first processing opening and a second processing opening are respectively formed at two ends of the current collector in the second direction, and the first processing opening and the second processing opening are respectively communicated with the current collection cavity; the first processing opening is connected to the cooling plate, and the plugging member is connected to the current collector and covers the second processing opening.

[0018] Optionally, the battery pack further includes a cover plate. One end of the current collector in the second direction is provided with a third processing opening, and one end in the third direction is provided with a fourth processing opening. The third processing opening and the fourth processing opening are respectively communicated with the current collection cavity. The third processing opening is connected to the cooling plate, and the cover plate is connected to the current collector and covers all the fourth processing openings.

[0019] Optionally, the cooling plate is a non-metallic material part, and / or the current collector is a non-metallic material part.

[0020] The utility model discloses a battery pack. The end of the cooling plate along the second direction Y is connected to the current collector. The cooling plate and the current collector are directly connected. Moreover, one current collector can be connected to multiple cooling plates. Thus, the current collector can take into account the functions of current collection and connection to multiple cooling plates, with a relatively high integration degree. It can reduce the components of the cooling device, reduce the installation process, and reduce the connection positions, thereby reducing the risk of connection failure and effectively improving the yield rate and service life of the battery pack.

[0021] The current collector is provided with a plurality of current collection cavities arranged at intervals in the first direction X, and a barrier structure located between two adjacent current collection cavities. Any current collection cavity of the current collector is communicated with at least one first cooling channel in a cooling plate, and the plurality of current collection cavities of the current collector are respectively communicated with the first cooling channels in a plurality of cooling plates to allow a cooling medium to enter or flow out of the first cooling channels. The barrier structure separates two adjacent current collection cavities, which can avoid heat exchange between two adjacent current collection cavities and affect the cooling effect.

[0022] The above description is only an overview of the technical solution of the utility model. In order to be able to understand the technical means of the utility model more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the utility model more obvious and understandable, the following specifically gives the specific embodiments of the utility model. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of an exploded view of the battery pack provided by the utility model;

[0025] Figure 2 It is a schematic structural diagram of an exploded view of the current collector and the cooling plate provided by the utility model Figure 1 ;

[0026] Figure 3 Schematic diagram of the structure of the exploded view of the current collector and the cooling plate provided by the present utility model Figure 2 ;

[0027] Figure 4 Schematic diagram of the structure of the exploded view of the current collector and the cooling plate provided by the present utility model Figure 3 ;

[0028] Figure 5 Schematic diagram of the structure of the connection of the current collector, the cooling plate and the single cell provided by the present utility model Figure 1 ;

[0029] Figure 6 is Figure 5 Schematic diagram of the structure of the cooling medium flow channel in the top view;

[0030] Figure 7 Schematic diagram of the structure of the connection of the current collector, the cooling plate and the single cell provided by the present utility model Figure 2 ;

[0031] Figure 8 Schematic diagram of the structure of the connection of the current collector, the cooling plate and the single cell provided by the present utility model Figure 3 ;

[0032] Figure 9 Schematic diagram of the structure of the connection of the current collector, the cooling plate and the single cell provided by the present utility model Figure 4 ;

[0033] Figure 10 Schematic diagram of the structure of the connection of the upper cover, the current collector, the cooling plate and the single cell provided by the present utility model;

[0034] Figure 11 Schematic diagram of the structure of the connection of the current collector, the cooling plate and the single cell provided by the present utility model Figure 5 ;

[0035] Figure 12 Schematic diagram of the structure of the current collector provided by the present utility model Figure 1 ;

[0036] Figure 13 Schematic diagram of the structure of the current collector provided by the present utility model Figure 2 ;

[0037] Figure 14 is Figure 13 Schematic diagram of the structure of the exploded view of the current collector;

[0038] Figure 15 is Figure 13 Schematic diagram of the structure of the cross-sectional view of the current collector;

[0039] Figure 16 This is a schematic structural diagram of a single battery provided by the present utility model.

[0040] Reference numerals:

[0041] 1. Upper cover;

[0042] 2. Cooling device;

[0043] 21. Current collector; 211. Current collection cavity; 212. First processing opening; 213. Second processing opening; 214. Third processing opening; 215. Fourth processing opening; 216. Cover plate;

[0044] 23. Cooling plate; 231. First cooling channel; 232. Bending part;

[0045] 24. Sealing member;

[0046] 25. Water inlet and outlet;

[0047] 26. Barrier structure; 261. Barrier cavity; 262. Barrier plate;

[0048] 3. Bus bar;

[0049] 4. Single battery; 41. Terminal post;

[0050] 5. Box body; 51. Accommodation cavity;

[0051] X. First direction; Y. Second direction; Z. Third direction. Detailed implementation manners

[0052] Hereinafter, exemplary embodiments of the present utility model will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present utility model can be more thoroughly understood and the scope of the present utility model can be completely conveyed to those skilled in the art.

[0053] In this application, the term "parallel" includes not only the case of absolute parallelism but also the case of approximately parallelism commonly recognized in engineering. For example, "parallel" means a state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°; at the same time, "perpendicular" also includes not only the case of absolute perpendicularity but also the case of approximately perpendicularity commonly recognized in engineering. For example, "perpendicular" means a state where the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distance or equal angle includes not only the case of absolute equality but also the case of approximately equality commonly recognized in engineering, that is, there can be a certain error, such as a state where the tolerance range is -1% to 1%.

[0054] Referring to Figures 1 to 16 As shown, an embodiment of the present application discloses a battery pack, which includes an upper cover 1, a cooling device 2, a bus bar 3, a single cell 4, and a box body 5. A receiving cavity 51 is provided in the box body 5, and the upper cover 1 is connected to the box body 5 to cover the receiving cavity 51. Among them, the upper cover 1 can be located on the upper side of the box body 5; when the battery pack is inverted, the upper cover 1 can also be located on the lower side of the box body 5. The box body 5 further includes a frame and a bottom, one end of the frame is connected to the bottom, and the other end of the frame is connected to the upper cover 1.

[0055] The cooling device 2, the bus bar 3, and the single cell 4 are all arranged in the receiving cavity 51. The cooling device 2 is used to cool the single cell 4. The cooling device 2 includes a current collector 21 and a plurality of cooling plates 23. Of course, in actual applications, the cooling device 2 can also include other cooling components such as liquid cooling plates located between adjacent single cells 4. The bus bar 3 is connected to the pole post 41 of the single cell 4.

[0056] Further referring to Figures 1 to 16 As shown, the battery pack has a first direction X, a second direction Y, and a third direction Z that intersect pairwise. The embodiment of the present application does not specifically limit the angles between the first direction X, the second direction Y, and the third direction Z. Preferably, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other pairwise. The cooling device 2 of the battery pack includes a current collector 21 and a plurality of cooling plates 23; the plurality of cooling plates 23 are arranged at intervals in the first direction X, the ends of the plurality of cooling plates 23 along the second direction Y are connected to the current collector 21, and a first cooling channel 231 is provided in the cooling plate 23; the current collector 21 extends along the first direction X, and a plurality of current collecting cavities 211 and a blocking structure 26 are provided in the current collector 21; the plurality of current collecting cavities 211 are arranged at intervals in the first direction X, and one of the current collecting cavities 211 is communicated with at least one first cooling channel 231 in the cooling plate 23; the blocking structure 26 is located between adjacent current collecting cavities 211 to separate adjacent current collecting cavities 211.

[0057] Among them, any one of the current collecting cavities 211 in the current collector 21 is communicated with at least one first cooling channel 231 in the cooling plate 23, and the plurality of current collecting cavities 211 of the current collector 21 are respectively communicated with the first cooling channels 231 in the plurality of cooling plates 23 to supply a cooling medium to enter or flow out of the first cooling channel 231.

[0058] In the embodiment of the present application, the end of the cooling plate 23 along the second direction Y is connected to the current collector 21. The cooling plate 23 and the current collector 21 are directly connected. Moreover, one current collector 21 can be connected to a plurality of cooling plates 23, which can reduce the components of the cooling device 2, reduce the installation process, and reduce the connection positions, thereby reducing the risk of connection failure, and can effectively improve the yield and service life of the battery pack.

[0059] In some embodiments, the barrier structure 26 separates two adjacent current collecting cavities 211. The barrier structure 26 can be a solid block structure, which can be integrally formed with the body of the current collector 21. It can be understood that after the current collecting cavities 211 are processed in the current collector 21, the portion between the adjacent current collecting cavities 211 can form the barrier structure 26.

[0060] Optionally, in some other embodiments, referring to Figure 6 、 Figure 8 and Figure 9 as shown, the barrier structure 26 is provided with a barrier cavity 261. The barrier cavity 261 is located between two adjacent current collecting cavities 211. The barrier cavity 261 is disconnected from both the current collecting cavity 211 and the first cooling channel 231, and the barrier cavity 261 forms the barrier structure 26.

[0061] In the embodiments of the present application, the barrier cavity 261 is located between two adjacent current collecting cavities 211, and the barrier cavity 261 separates the two adjacent current collecting cavities 211, which can avoid heat exchange between the two adjacent current collecting cavities 211. The barrier cavity 261 is disconnected from both the current collecting cavity 211 and the first cooling channel 231. No cooling medium is provided in the barrier cavity 261, and moreover, some materials of the current collector 21 are saved, which is beneficial to reducing the weight of the current collector 21, and thus improving the weight energy density of the whole package.

[0062] In some other embodiments, referring to Figures 13 to 15 as shown, the current collector 21 is provided with a barrier plate 262. The barrier plate 262 extends along the third direction Z. The barrier plate 262 is located between two adjacent current collecting cavities 211 to disconnect the two adjacent current collecting cavities 211, and the barrier plate 262 forms the barrier structure 26.

[0063] In the above structure of the embodiments of the present application, the current collector 21 is provided with a cavity, and the barrier plate 262 is arranged in the cavity to disconnect the cavity to form two adjacent current collecting cavities 211. The barrier plate 262 can avoid heat exchange between two adjacent current collecting cavities 211. When there are multiple barrier plates 262, multiple independent current collecting cavities 211 can be formed in the current collector 21. Since one current collecting cavity 211 can be communicated with at least one first cooling channel 231 in at least one cooling plate 23, when multiple independent current collecting cavities 211 are formed in the current collector 21, one current collector 21 can be connected to multiple cooling plates 23.

[0064] Optionally, the number of the current collecting cavities 211 in the current collector 21 is set according to the use requirements. For example, referring to Figure 6 as shown, Figure 6There are two current collecting chambers 211 provided in the current collector 21 on the upper side. The left current collecting chamber 211 communicates with the first cooling channels 231 in the two cooling plates 23 on the left side, and the right current collecting chamber 211 communicates with the first cooling channels 231 in the two cooling plates 23 on the right side. Figure 6 There are three current collecting chambers 211 provided in the current collector 21 on the lower side. The left current collecting chamber 211 communicates with the first cooling channel 231 in one cooling plate 23 on the left side, the middle current collecting chamber 211 communicates with the first cooling channels 231 in the two cooling plates 23 in the middle, and the right current collecting chamber 211 communicates with the first cooling channel 231 in one cooling plate 23 on the right side. A serpentine cooling medium flow channel is formed between the current collecting chamber 211 and the first cooling channel 231.

[0065] Optionally, there are multiple current collectors 21 provided, and the cooling plates 23 are connected to the current collectors 21 at both ends in the second direction Y.

[0066] In the above structure of the embodiment of the present application, there are multiple current collectors 21 provided, and the arrangement of the current collectors 21 is relatively flexible, which can meet the requirements such as the layout in the battery pack. For example, referring to Figure 5 as shown, there are two current collectors 21 provided, and the two current collectors 21 are respectively located on both sides of the cooling plate 23 in the second direction Y. Another example, referring to Figure 1 and Figure 4 as shown, there are three current collectors 21 provided, two current collectors 21 are located on one side of the cooling plate 23 in the second direction Y, and the other current collector 21 is located on the other side of the cooling plate 23 in the second direction Y. Among the two current collectors 21 connected to both ends of the cooling plate 23 in the second direction Y, one current collector 21 is used to introduce the cooling medium into the first cooling channel 231 of the cooling plate 23, and the other current collector 21 is used to receive the cooling medium flowing out of the first cooling channel 231 of the cooling plate 23.

[0067] Optionally, at least two current collectors 21 are arranged at the same end of the cooling plate 23 along the second direction Y and are arranged at intervals along the first direction X.

[0068] In the embodiment of the present application, at least two current collectors 21 are arranged at the same end of the cooling plate 23 along the second direction Y and are arranged at intervals along the first direction X, then the at least two current collectors 21 at the same end are not connected, which can avoid the multiple installation processes caused by the connection between the two current collectors 21, can reduce the connection positions, and further reduce the risk of connection failure, and can effectively improve the yield rate of the battery pack; moreover, in the case of realizing the flow path direction in the cooling device 2, part of the material of the current collector 21 is also saved, which is beneficial to reducing the weight of the current collector 21, and further improving the weight energy density of the whole package.

[0069] Furthermore, referring to Figure 4As shown, two current collectors 21 are provided on the lower left side of the cooling plate 23 (the barrier structure 26 is not shown). A current collection cavity 211 is provided in each current collector 21. The first cooling channels 231 of the two cooling plates 23 on the upper side are communicated with the current collection cavity 211 in one current collector 21, and the first cooling channels 231 of the two cooling plates 23 on the lower side are communicated with the current collection cavity 211 in the other current collector 21.

[0070] Optionally, referring to Figure 10 and Figure 11 As shown, at least one end of the cooling plate 23 in the second direction Y is bent away from the upper cover 1 to form a bent portion 232, and the current collector 21 is connected to the bent portion 232; on the side of the current collector 21 close to the upper cover 1 in the third direction Z, the current collector 21 is flush with the cooling plate 23 or lower than the cooling plate 23.

[0071] In the above structure of the embodiment of the present application, the current collector 21 is flush with the cooling plate 23 or lower than the cooling plate 23. Referring to Figure 11 As shown, the height L1 from the current collector 21 to the bottom surface of the single cell 4 is less than or equal to the height L2 from the cooling plate 23 to the bottom surface of the single cell 4, that is, the current collector 21 does not protrude from the cooling plate 23 in the third direction Z, which can reduce the space occupied by the current collector 21 in the third direction Z, is beneficial to reducing the size of the battery pack in the third direction Z, and improving the volume utilization rate of the battery pack.

[0072] Optionally, referring to Figure 10 As shown, the current collector 21 is provided with a water inlet and outlet 25. One end of the water inlet and outlet 25 is connected to the end of the current collector 21 facing away from the upper cover 1, and the other end of the water inlet and outlet 25 extends in a direction away from the upper cover 1.

[0073] In the embodiment of the present application, the water inlet and outlet 25 extends into the battery pack, making full use of the space below the current collector 21, having enough space to connect with the components of the water inlet pipe and the water outlet pipe, which is beneficial to arranging the cooling circuit; moreover, a single cell 4 is provided below the cooling plate 23, and the water inlet and outlet 25 utilizes the space occupied by the single cell 4 in the third direction Z, and the water inlet and outlet 25 does not additionally occupy the space in the third direction Z, which is beneficial to reducing the size of the battery pack in the third direction Z.

[0074] Optionally, referring to Figure 5 As shown, there are at least two water inlets and outlets 25. Some of the water inlets and outlets 25 are used for flowing in the cooling medium, and the remaining part of the water inlets and outlets 25 is used for flowing out the cooling medium. For example, referring to Figure 5As shown, there are three inlets and outlets 25, and the three inlets and outlets 25 are in one-to-one correspondence and communication with three current collecting chambers 211 in the current collector 21. The middle inlet and outlet 25 is used for the inflow of the cooling medium, and the remaining two inlets and outlets 25 are used for the outflow of the cooling medium. For another example, if there are two inlets and outlets 25 in total, one of the inlets and outlets 25 is used for the inflow of the cooling medium, and the other inlet and outlet 25 is used for the outflow of the cooling medium.

[0075] Optionally, in one embodiment, referring to Figure 3 and Figure 4 As shown, the battery pack further includes a plugging member 24. The current collector 21 is respectively provided with a first processing opening 212 and a second processing opening 213 at both ends in the second direction Y. The first processing opening 212 and the second processing opening 213 are respectively in communication with the current collecting chamber 211; the first processing opening 212 is connected to the cooling plate 23, and the plugging member 24 is connected to the current collector 21 and covers the second processing opening 213.

[0076] In the embodiment of the present application, the current collector 21 is connected to the cooling plate 23 through the first processing opening 212. Compared with the communication between the current collecting chamber 211 and the cooling plate 23 through a pipeline, the installation process between the current collector 21 and the cooling plate 23 can be reduced, the connection positions can be reduced, and thus the risk of connection failure can be reduced, effectively improving the yield rate of the battery pack. The plugging member 24 is connected to the current collector 21 and covers the second processing opening 213, so that the current collector 21 can realize the sealing of the current collecting chamber 211 while meeting the processing requirements.

[0077] Optionally, referring to Figure 6 and Figure 7 As shown, in the first direction X, the lower current collector 21 is provided with three current collecting chambers 211. The leftmost current collecting chamber 211 is in communication with the first cooling flow channel 231 in the leftmost cooling plate 23, and the middle current collecting chamber 211 is in communication with the first cooling flow channel 231 in the middle two cooling plates 23. In order to reduce the volume of the current collecting chamber 211, reduce the amount of the cooling medium used, and reduce the total size of the current collector 21, in the first direction X, the width D1 of the leftmost current collecting chamber 211 is slightly larger than the width H1 of the leftmost cooling plate 23, and the width D2 of the middle current collecting chamber 211 is slightly larger than the distance H2 between both ends of the middle two cooling plates 23.

[0078] Optionally, in one embodiment, referring to Figure 1 and Figure 12 As shown, the current collector 21 is provided with a third processing opening 214 at one end in the second direction Y, and the current collector 21 is provided with a fourth processing opening 215 at one end in the third direction Z. The third processing opening 214 and the fourth processing opening are respectively in communication with the current collecting chamber 211; the third processing opening 214 is connected to the cooling plate 23, and the cover plate 216 is connected to the current collector 21 and covers all the fourth processing openings 215.

[0079] The current collector 21 is connected to the cooling plate 23 through the third processing opening 214. Compared with the connection between the current collection cavity 211 and the cooling plate 23 through a pipeline, the installation process between the current collector 21 and the cooling plate 23 can be reduced, the connection positions can be reduced, and thus the risk of connection failure can be reduced, effectively improving the yield rate of the battery pack. The cover plate 216 is connected to the current collector 21 and covers all the fourth processing openings 215, so that the current collector 21 can seal the current collection cavity 211 while meeting the processing requirements.

[0080] Optionally, the cooling plate 23 is a non-metallic material part, and / or the current collector 21 is a non-metallic material part.

[0081] In the embodiment of the present application, the non-metallic material part generally has poor thermal conductivity, which can effectively avoid heat exchange between the current collection cavities 211 in the current collector 21, and can also achieve the light weight of the current collector 21.

[0082] Furthermore, when the cooling plate 23 is a metal material part, due to the excellent thermal conductivity of the metal material part, during the cooling process of the same group of single cells 4, the temperature difference between the single cells 4 before and after the cooling medium flows through the cooling plate 23 is too large, and the global temperature difference increases, which is not conducive to the balance of the working environment between the single cells 4, resulting in a decrease in the consistency of the single cells 4. In the embodiment of the present application, the cooling plate 23 is a non-metallic material part with poor thermal conductivity, which can avoid the above problems, and the single cells 4 have the advantage of good temperature consistency.

[0083] Optionally, the cooling plate 23 is a plastic material part, and the specific plastic material part is selected according to the use requirements. The embodiment of the present application does not make specific limitations in this regard. The plastic material part is, for example, at least one of ABS (acrylonitrile-butadiene-styrene copolymer), PA (polyamide), and PP (polypropylene).

[0084] Optionally, the current collector 21 is a plastic material part, and the specific plastic material part is also selected according to the use requirements. The embodiment of the present application does not make specific limitations in this regard. The plastic material part is, for example, ABS, PA, or PP.

[0085] Optionally, referring to Figures 1 to 5 、 Figure 16 As shown, the battery pack further includes a plurality of single cells 4, and the plurality of single cells 4 are arranged along the first direction X and the second direction Y. Additionally, the plurality of single cells 4 can also be arranged only along the first direction X or the second direction Y; the single cell 4 is provided with a pole column 41, the cooling plate 23 is located on the side of the single cell 4 where the pole column 41 is provided, and the cooling plate 23 is thermally connected to the pole column 41.

[0086] In the embodiment of the present application, the cooling plate 23 is thermally connected to the pole 41, and the cooling plate 23 can achieve heat dissipation of the pole 41. Moreover, since the pole 41 is directly connected to the pole piece inside the single battery 4, the heat inside the single battery 4 is directly transferred to the cooling plate 23 through the pole 41, and the cooling effect is better.

[0087] Optional, see Figures 1 to 16 As shown, the battery pack further includes a plurality of busbars 3 , which are arranged along the second direction Y, connected to the poles 41 of at least two single cells 4 , and the ends of the plurality of busbars 3 facing away from the single cells 4 are connected to the cooling plate 23 .

[0088] Reference Figure 5 As shown, the surface with the largest area in the single cell 4 is parallel to the plane XZ, the cooling plate 23 is arranged along the second direction Y, and the bus 3 is arranged along the second direction Y, then the cooling plate 23 and the bus 3 extend in the thickness direction of the single cell 4 respectively, so that the length extension direction of the cooling plate 23 and the bus 3 is consistent, relative to the cooling plate 23 extending in the length direction of the single cell 4, the effective utilization rate of the cooling plate 23 can be improved, that is, the heat exchange area ratio of the cooling plate 23 is increased, and the number of cooling plates 23 is relatively small, saving the cost of the battery pack.

[0089] Optionally, a single cell 4 , a cooling plate 23 and a current collector 21 are disposed in the accommodating cavity 51 , the single cell 4 is connected to the box body 5 , and the current collector 21 is connected to the upper cover 1 .

[0090] Reference Figure 1 As shown, the current collector 21 is connected to the surface of the upper cover 1 facing the single battery 4, and most of the weight of the current collector 21 and the cooling plate 23 is borne by the upper cover 1, which is beneficial to reducing the force on the pole 41.

[0091] In the embodiment of the present application, the end of the cooling plate 23 along the second direction Y is connected to the current collector 21. The cooling plate 23 and the current collector 21 are directly connected without using a pipeline for connection, which can reduce the components of the cooling device 2, reduce the installation process, and reduce the connection position, thereby reducing the risk of connection failure, and effectively improving the yield rate of the battery pack. In addition, the connection between the cooling plate 23 and the current collector 21 is more tightly connected, which improves the overall stability and structural strength of the battery pack.

[0092] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0093] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments. For the embodiments of the apparatus, electronic device, computer-readable storage medium and computer program product containing instructions, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiments.

[0094] The above description is only a preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims

1. A battery pack having a first direction (X), a second direction (Y) and a third direction (Z) intersecting each other, characterized in that: The battery pack comprises a current collector (21) and a plurality of cooling plates (23); The plurality of cooling plates (23) are arranged at intervals in the first direction (X), the ends of the plurality of cooling plates (23) along the second direction (Y) are connected to the current collector (21), and a first cooling channel (231) is provided in the cooling plate (23); The current collector (21) extends along the first direction (X), and a plurality of current collecting cavities (211) and a barrier structure (26) are provided in the current collector (21); the plurality of current collecting cavities (211) are arranged at intervals in the first direction (X), and one of the current collecting cavities (211) is connected to a first cooling channel (231) in at least one of the cooling plates (23); and the barrier structure (26) is located between two adjacent current collecting cavities (211) to separate the two adjacent current collecting cavities.

2. The battery pack according to claim 1, characterized in that: The barrier structure (26) is provided with a barrier cavity (261), the barrier cavity (261) is located between two adjacent manifold cavities (211), and the barrier cavity (261) is disconnected from the manifold cavities (211) and the first cooling channel (231).

3. The battery pack according to claim 1, characterized in that: The current collector (21) is provided with a blocking plate (262), the blocking plate (262) extending along the third direction (Z), the blocking plate (262) being located between two adjacent current collecting cavities (211) to disconnect the two adjacent current collecting cavities (211), and the blocking plate (262) forming the blocking structure (26).

4. The battery pack according to claim 1, characterized in that: A plurality of current collectors (21) are provided, and both ends of the cooling plate (23) in the second direction (Y) are connected to the current collectors (21).

5. The battery pack according to claim 4, characterized in that: At least two current collectors (21) are arranged at the same end of the cooling plate (23) along the second direction (Y), and are arranged at intervals along the first direction (X).

6. The battery pack according to claim 1, characterized in that: The battery pack further comprises an upper cover (1), at least one end of the cooling plate (23) in the second direction (Y) is bent away from the upper cover (1) to form a bent portion (232), and the current collector (21) is connected to the bent portion (232); On the side close to the upper cover (1) in the third direction (Z), the current collector (21) is flush with the cooling plate (23) or lower than the cooling plate (23).

7. The battery pack according to claim 6, characterized in that: The current collector (21) is provided with a water inlet and outlet (25), one end of the water inlet and outlet (25) is connected to the end of the current collector (21) away from the upper cover (1), and the other end of the water inlet and outlet (25) extends in a direction away from the upper cover (1).

8. The battery pack according to claim 1, characterized in that: The battery pack further comprises a plurality of single cells (4), wherein the plurality of single cells (4) are arranged along a first direction (X) and / or a second direction (Y); The single cell (4) is provided with a pole (41), the cooling plate (23) is located on a side of the single cell (4) provided with the pole (41), and the cooling plate (23) is thermally connected to the pole (41).

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises a plurality of busbars (3), the busbars (3) being arranged along the second direction (Y), the busbars (3) being connected to the poles (41) of at least two of the single cells (4), and the ends of the plurality of busbars (3) facing away from the single cells (4) being connected to the cooling plate (23).

10. The battery pack according to claim 9, characterized in that: The busbar (3) and the cooling plate (23) have the same length extension direction and are perpendicular to the surface with the largest area in the single battery (4).

11. The battery pack according to claim 8, characterized in that: The battery pack further comprises a box body (5) and an upper cover (1); a receiving cavity (51) is provided in the box body (5); and the upper cover (1) is connected to the box body (5) to cover the receiving cavity (51); The single cell (4), the cooling plate (23) and the current collector (21) are arranged in the accommodating cavity (51); the single cell (4) is connected to the box body (5); and the current collector (21) is connected to the upper cover (1).

12. The battery pack according to claim 1, characterized in that: The battery pack further comprises a sealing member (24); the current collector (21) is provided with a first processing opening (212) and a second processing opening (213) at two ends in the second direction (Y), respectively; the first processing opening (212) and the second processing opening (213) are respectively connected to the current collecting cavity (211); The first machined opening (212) is connected to the cooling plate (23), and the blocking member (24) is connected to the current collector (21) and covers the second machined opening (213).

13. The battery pack according to claim 1, characterized in that: The battery pack further comprises a cover plate (216); the current collector (21) is provided with a third processing opening (214) at one end in the second direction (Y), and a fourth processing opening (215) at one end in the third direction (Z); the third processing opening (214) and the fourth processing opening are respectively connected to the current collecting cavity (211); The third processing opening (214) is connected to the cooling plate (23), and the cover plate (216) is connected to the current collector (21) and covers all of the fourth processing openings (215).

14. The battery pack according to claim 1, characterized in that: The cooling plate (23) is a non-metallic material, and / or the current collector (21) is a non-metallic material.

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