A cooling structure suitable for a lying type battery cell and a battery pack thereof

Abstract

The application relates to the technical field of cell cooling, and provides a cooling structure suitable for a lying cell and a battery pack thereof, which mainly comprises a liquid cooling bottom plate, a plurality of insulating partitions, a plurality of first uniform temperature plates, a plurality of second uniform temperature plates and a plurality of third uniform temperature plates arranged on the liquid cooling bottom plate; installation gaps are formed between the insulating partitions and the first uniform temperature plates, a plurality of the second uniform temperature plates are arranged in the installation gaps at intervals to form a plurality of installation cavities, a plurality of the third uniform temperature plates are arranged in the installation cavities, and accommodation spaces for mounting the cells are formed between the third uniform temperature plates and the liquid cooling bottom plate and / or between two third uniform temperature plates. Compared with the mode of arranging a liquid cooling plate only at the bottom of a cell module in the prior art, the application can effectively reduce the contact thermal resistance between the cell and the cooling system, greatly guarantee the temperature control performance of the cooling system, and ensure or even improve the thermal management efficiency of the cell.

Description

Technical Field

[0001] This application relates to the field of battery cell cooling technology, and more specifically, to a cooling structure suitable for horizontally mounted battery cells and its battery pack. Background Technology

[0002] Currently, the battery packs used in mainstream new energy vehicles at home and abroad usually adopt a conventional layout scheme, that is, a liquid cooling plate is laid at the bottom of the battery pack box, and then the cell modules are installed on the liquid cooling plate so that heat exchange can be carried out between the bottom end face of the cell module and the liquid cooling plate, thereby realizing thermal management of the cell module.

[0003] However, in practical applications, the inventors found that the conventional battery pack layout works relatively well when the battery pack is short. However, when the battery pack is long, controlling the flatness of the bottom-mounted liquid cooling plate is often difficult. Furthermore, the relatively long length of the battery cell modules themselves leads to situations where the contact area between the cell modules and the liquid cooling plate is reduced or even nonexistent, affecting the thermal management efficiency of the cell modules. Especially when dealing with combined conditions such as high-speed climbing and high-power fast charging, the temperature difference on the cell modules increases rapidly, impacting the overall vehicle power performance and driving range, thus reducing the product's competitiveness. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this application is to provide a cooling structure and battery pack suitable for horizontal battery cells, which can effectively realize thermal management of the battery cells and facilitate the performance of the battery pack.

[0005] The technical means adopted in this application to solve the above-mentioned technical defects are:

[0006] This application provides a cooling structure suitable for horizontal battery cells, including a liquid-cooled base plate, a plurality of insulating partitions, a plurality of first heat-equalizing plates, a plurality of second heat-equalizing plates, and a plurality of third heat-equalizing plates.

[0007] A plurality of insulating partitions and a plurality of first temperature equalization plates are disposed alternately on the liquid-cooled base plate, and an installation gap is formed between the insulating partitions and the first temperature equalization plates, wherein the first temperature equalization plates are in contact with the liquid-cooled base plate.

[0008] A plurality of second heat spreaders are disposed at intervals within the mounting gap to form a plurality of mounting cavities, and the second heat spreaders are in contact with and connected to the first heat spreader and / or the liquid-cooled base plate;

[0009] A plurality of the third heat exchange plates are disposed in the mounting cavity, and a space for mounting the power supply core is formed between the third heat exchange plates and the liquid cooling base plate and / or between two third heat exchange plates. The third heat exchange plates are in contact with the first heat exchange plate and / or the second heat exchange plate.

[0010] In the above implementation process, by setting the accommodating space, when the battery cell is installed in the accommodating space, heat exchange structural components are provided on the upper, lower, left, right and bottom sides of the battery cell. Compared with the traditional technology of only setting a liquid cooling plate at the bottom of the battery cell module, this effectively reduces the contact thermal resistance between the battery cell and the cooling system, greatly ensures the temperature control performance of the cooling system, and ensures or even improves the thermal management efficiency of the battery cell.

[0011] Furthermore, a plurality of battery cells are stacked in the mounting cavity, and the plurality of battery cells are arranged one-to-one in the accommodating space, with the third heat spreader sandwiched between two adjacent battery cells.

[0012] In the above implementation process, several battery cells are stacked in the mounting cavity, thereby enabling the battery cells to be installed in a flat position. The stacked battery cells are also sandwiched between the third heat exchange plate, which, while ensuring the heat exchange effect for each battery cell, also isolates the battery cells in the same mounting cavity through the cleverly designed third heat exchange plate, thereby preventing the spread of thermal runaway between the battery cells in the same mounting cavity and making the battery cells safer to use.

[0013] Furthermore, an insulating thermally conductive pad is sandwiched between the battery cell located at the bottom layer and the liquid-cooled base plate.

[0014] In the above implementation process, the insulating thermal pad facilitates the installation and connection between the battery cell located at the bottom layer and the liquid cooling base plate, realizing direct heat exchange between the battery cell and the liquid cooling base plate. At the same time, the insulating thermal pad can absorb the planar error of the battery cell or the liquid cooling base plate on the contact surface, so as to ensure the cooling effect.

[0015] Furthermore, an insulating and thermally conductive layer is provided between the battery cell and the first and / or the second and / or the third heat spreader.

[0016] Furthermore, the insulating and thermally conductive layer between the battery cell and the second and / or the third heat spreader is an insulating and thermally conductive double-sided adhesive.

[0017] In the above implementation process, the insulating and thermally conductive layer facilitates the installation and connection between the battery cell and the first, second, and third heat exchange plates, thereby improving the compatibility of the battery cell during installation while ensuring the thermal management effect of the battery cell.

[0018] Furthermore, the third temperature distribution plate has several protruding locking blocks on its side, and the insulating partition and / or the first temperature distribution plate has locking slots for the locking blocks to engage.

[0019] In the above implementation process, the cooperation of the set card block and card slot can facilitate the pre-installation and fixation of the third heat exchange plate in the installation cavity, and at the same time enhance the contact connection between the third heat exchange plate and the first heat exchange plate, thereby ensuring the heat exchange effect.

[0020] This application also provides a battery pack including the cooling structure described above for horizontally mounted battery cells.

[0021] In the above implementation process, by setting the cooling structure provided in this application inside the battery pack, the cells can be installed in a flat position inside the battery pack, thus providing a new layout idea for the cells inside the battery pack.

[0022] Furthermore, the system includes a mounting frame, wherein the liquid-cooled base plate is disposed as an end plate structural component on the bottom end face of the mounting frame.

[0023] In the above implementation process, by cleverly setting the liquid cooling base plate as the base plate of the battery pack mounting frame, the space occupied by the liquid cooling system in the battery pack is reduced, resulting in higher integration of the battery pack and higher space utilization.

[0024] Furthermore, the liquid-cooled base plate is formed by splicing together several liquid-cooled substrates, and the liquid-cooled substrates are provided with inlets and outlets for supplying coolant.

[0025] In the above implementation process, by cleverly setting the liquid-cooled base plate to be formed by splicing several liquid-cooled substrates, the molding size of the liquid-cooled substrate can be more controllable, so as to further improve the heat exchange efficiency between the liquid-cooled substrate and the battery cell.

[0026] Furthermore, the mounting frame is also provided with a number of limiting strips, and the limiting strips and the two sides of the mounting frame form a limiting space for the installation of the insulating partition, the first heat equalizing plate and the second heat equalizing plate.

[0027] In the above implementation process, the limiting space formed can make the state of the insulating partition, the first heat-equalizing plate and the second heat-equalizing plate more stable after installation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the internal structure of the battery pack in this application.

[0030] Figure 2 This is a structural diagram of the installation frame for this application.

[0031] Figure 3 This is a schematic diagram of the installation structure between the battery cell and the second and third heat exchange plates in this application.

[0032] Figure 4 This is a schematic diagram of the installation structure between the battery cell and the third heat exchanger plate in this application.

[0033] Figure 5 This is a top view of the third heat exchanger plate of this application.

[0034] Marker explanation:

[0035] 1-Liquid-cooled base plate, 11-Liquid-cooled base plate, 111-Water inlet, 112-Water outlet;

[0036] 2-Insulating partition; 3-First heat spreader; 4-Second heat spreader;

[0037] 5-Third heat spreader, 51-Card block;

[0038] 6-Battery cell;

[0039] 7- Mounting frame, 71- Limiting strip. Detailed Implementation

[0040] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. Similar reference numerals and letters denote similar items in the following figures; therefore, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] like Figure 1-5 As shown, this embodiment provides a cooling structure suitable for horizontal battery cells, mainly including a liquid-cooled base plate 1, several insulating partitions 2, several first heat spreaders 3, several second heat spreaders 4, and several third heat spreaders 5. The working principles of the first heat spreaders 3, second heat spreaders 4, and third heat spreaders 5 are readily available in the prior art and will not be elaborated here.

[0043] As one application example, in this embodiment, the liquid-cooled base plate 1 is rectangular, and the insulating partition 2, the first heat-equalizing plate 3, the second heat-equalizing plate 4 and the third heat-equalizing plate 5 are all disposed on the same side of the liquid-cooled base plate 1.

[0044] Furthermore, a plurality of insulating partitions 2 and a plurality of first temperature-equalizing plates 3 are arranged at intervals, such that there is a first temperature-equalizing plate 3 between two adjacent insulating partitions 2, and an insulating partition 2 between two adjacent first temperature-equalizing plates 3. At this time, a plurality of installation gaps are formed between the insulating partitions 2 and the first temperature-equalizing plates 3. The installation gaps are elongated, with the insulating partitions 2 and the first temperature-equalizing plates 3 on their two sides, and the liquid-cooled base plate 1 at the bottom of the installation gaps.

[0045] As a preferred embodiment, in this case, the insulating partition 2 and the first heat spreader 3 are welded together on the liquid-cooled base plate 1. The number of insulating partitions 2 is one more than the number of first heat spreaders 3, so that in the entire structure after the insulating partitions 2 and the first heat spreaders 3 are installed, both sides use the insulating partitions 2 as side plate structural components, thereby improving the protection of the installed battery cells 6 and each heat spreader. Simultaneously, the contact connection between the bottom of the first heat spreader 3 and the liquid-cooled base plate 1 facilitates effective heat exchange between them.

[0046] Several second heat equalization plates 4 are arranged at intervals within the mounting gaps, such that several mounting cavities are formed in the length direction of each mounting gap.

[0047] As a preferred embodiment, the second heat exchanger 4 is also welded onto the liquid-cooled base plate 1, and the second heat exchanger 4 and the first heat exchanger 3 are also connected by heat transfer, such as by welding or by bonding with insulating thermally conductive adhesive. In this way, effective heat exchange can be achieved between the second heat exchanger 4, the first heat exchanger 3, and the liquid-cooled base plate 1.

[0048] Several of the aforementioned third heat exchange plates 5 are disposed within the mounting cavity. At this time:

[0049] When only one third heat exchanger plate 5 is provided in each of the mounting cavities, a space for installing the power supply core 6 is formed between the third heat exchanger plate 5 and the liquid cooling base plate 1, between the insulating partition plate 2 and the first heat exchanger plate 3, and between the two second heat exchanger plates 4.

[0050] When more than one third heat exchanger plate 5 is provided in the mounting cavity, in addition to the above-mentioned method of forming the accommodating space, accommodating spaces for installing the power supply core 6 are also formed between the two third heat exchanger plates 5, between the insulating partition plate 2 and the first heat exchanger plate 3, and between the two second heat exchanger plates 4.

[0051] As a preferred embodiment, after installation, the third heat exchange plate 5 is in contact with the insulating partition 2 and the first heat exchange plate 3, and can also be in contact with the second heat exchange plate 4. The third heat exchange plate 5 is also in contact with the first heat exchange plate 3 and the second heat exchange plate 4 through a thermally conductive contact connection. Thus, heat exchange can be achieved between the third heat exchange plate 5 and the first heat exchange plate 3 and the second heat exchange plate 4, thereby transferring heat to the liquid-cooled base plate 1 to achieve heat exchange and cooling.

[0052] As one application example, this solution features several locking blocks 51 protruding from the side of the third heat exchanger plate 5, while the insulating partition plate 2 and / or the first heat exchanger plate 3 are provided with slots for the locking blocks 51 to engage. The cooperation of the locking blocks 51 and the slots facilitates the pre-installation and fixation of the third heat exchanger plate 5 within the mounting cavity, while also enhancing the contact connection between the third heat exchanger plate 5 and the first heat exchanger plate 3, thereby ensuring effective heat exchange.

[0053] In this embodiment, when the battery cell 6 is installed, its bottom end face faces the first heat spreader 3. Here, the end face where the polarity contact of the battery cell 6 is located is considered the top end face, and the positive and negative polarity contacts of the battery cell 6 are both located on the same end face. Therefore, when the battery cell 6 is installed in the accommodating space, heat exchange structures can be provided on the upper, lower, left, right, and bottom sides of the battery cell 6, thus the battery cell 6 has at least four heat exchange paths:

[0054] The first method involves direct heat exchange between the lower side of the battery cell 6 and the liquid-cooled base plate 1 or the third heat exchange plate 5.

[0055] The second method involves heat exchange between the bottom end face of the battery cell 6 and the first heat exchange plate 3, and heat exchange between the first heat exchange plate 3 and the liquid-cooled base plate 1.

[0056] The third method involves heat exchange between the left and right sides of the battery cell 6 and the second heat exchange plate 4.

[0057] Fourth, heat exchange occurs between the upper side of the battery cell 6 and the third heat exchange plate 5.

[0058] Therefore, for the battery cell 6 with six sides, this solution can achieve heat exchange on five sides of the battery cell 6. Compared with the traditional technology of only setting a liquid cooling plate at the bottom of the battery cell module, it effectively reduces the contact thermal resistance between the battery cell 6 and the cooling system, thereby ensuring the thermal management effect of the battery cell 6 to a greater extent, and guaranteeing the temperature control performance of the cooling system and the performance of the battery pack.

[0059] In some of these applications, the temperature difference control of the battery pack can be changed from the original 15℃ to precise control within 5℃, which can extend the service life of the battery cell 6 and the battery pack by about 10%.

[0060] As a preferred embodiment, in this embodiment, a plurality of battery cells 6 are preferably stacked in the mounting cavity, and the plurality of battery cells 6 are arranged one-to-one in the accommodating space, with the third heat exchange plate 5 sandwiched between two adjacent battery cells 6.

[0061] This method allows for the flat installation of cell 6 within the cooling system and battery pack. Compared to the traditional cell module installation method, the flat installation proposed in this solution represents a completely new design concept. The flat installation of cell 6 facilitates the structural layout of the CTP (CELL TO PACK) battery pack. Taking the scheme of installing only two cells 6 in the same mounting cavity as an example, the overall height of the installed cell 6 is only about 100mm, far below the industry standard of 130mm. This greatly improves the adaptability of the battery pack layout and the vehicle's ground clearance, resulting in higher space utilization. When combined with cells of higher energy density, a higher energy-to-weight ratio can be achieved.

[0062] Meanwhile, by setting up the first heat spreader 3, the second heat spreader 4, and the third heat spreader 5, in addition to achieving internal circulation heat dissipation and temperature uniformity, it can also effectively avoid the complex process of setting up internal cooling circuits when setting up conventional cooling plates in traditional technology, thereby improving the reliability and safety of the product. Moreover, each heat spreader can also serve multiple functions such as installation support, cooling and heat exchange, fireproof and heat insulation between cells, buffering the aging and expansion space of cells, and bearing a certain flexible pressure plate, effectively avoiding the need to set up fireproof and heat insulation cotton, expansion buffer pads, and other structures in traditional technology, and realizing a high degree of integration of cells in the battery pack.

[0063] Moreover, in practical applications, compared with the traditional vertical installation method of battery cells, the horizontal installation method of battery cell 6 is more helpful for welding the terminals and copper busbars of battery cell 6. For example, it can reduce or even avoid the risk of high voltage breakdown caused by welding slag falling into the battery cell 6 during welding, and the installation operation can be more convenient and reliable.

[0064] Furthermore, in this embodiment, an insulating thermally conductive pad is sandwiched between the battery cell 6 located at the bottom layer and the liquid-cooled base plate 1. The insulating thermally conductive pad facilitates the installation and connection between the battery cell 6 located at the bottom layer and the liquid-cooled base plate 1, realizing direct heat exchange between the battery cell 6 and the liquid-cooled base plate 1. At the same time, the insulating thermally conductive pad can absorb the planar error of the battery cell 6 or the liquid-cooled base plate 1 on the contact surface, so as to ensure the cooling effect.

[0065] Furthermore, an insulating and thermally conductive layer is provided between the battery cell 6 and the first heat spreader 3 and / or the second heat spreader 4 and / or the third heat spreader 5; as a preferred embodiment, the insulating and thermally conductive layer between the battery cell 6 and the second heat spreader 4 and / or the third heat spreader 5 is provided as an insulating and thermally conductive double-sided adhesive.

[0066] In this solution, the insulating and thermally conductive layer facilitates the installation and connection between the battery cell 6 and the first heat exchanger 3, the second heat exchanger 4, and the third heat exchanger 5, thereby ensuring the thermal management effect of the battery cell 6 and improving the compatibility of the battery cell 6 during installation.

[0067] As a preferred embodiment, in this embodiment, the thermal conductivity of both the insulating thermal pad and the insulating thermal layer is greater than or equal to 3 W / (m·K).

[0068] Furthermore, this application also provides a battery pack, primarily benefiting from the cooling structure described above suitable for horizontally mounted battery cells 6. By incorporating the cooling structure provided in this application within the battery pack, the battery cells 6 can be installed horizontally within the battery pack, thus providing a novel layout approach for battery cells within the battery pack.

[0069] Furthermore, a mounting frame 7 is provided within the battery pack corresponding to the cooling structure. In this embodiment, the liquid-cooled base plate 1 is preferably disposed as an end plate structure on the bottom end face of the mounting frame 7. By cleverly setting the liquid-cooled base plate 1 as the base plate of the mounting frame 7 of the battery pack, the space occupied by the liquid cooling system within the battery pack is reduced, which allows for higher integration of the battery pack and further improves space utilization.

[0070] As a preferred embodiment, in this case, the liquid-cooled base plate 1 is formed by splicing together several liquid-cooled substrates 11, and each of the liquid-cooled substrates 11 is provided with an inlet 111 and an outlet 112 for supplying coolant. By cleverly setting the liquid-cooled base plate 1 to be formed by splicing together several liquid-cooled substrates 11, compared with the form of setting the liquid-cooled base plate 1 as a whole plate, the molding dimensions of the liquid-cooled substrates 11 are more controllable, thereby improving the effective contact between the battery cell 6 and the liquid-cooled base plate 1 after installation, and further reducing the contact thermal resistance.

[0071] Meanwhile, the liquid-cooled substrate 11 allows for a shorter relative path in the liquid-cooling circuit and improved controllability of the coolant during flow, thereby further enhancing the heat exchange efficiency between the liquid-cooled substrate 11 and the battery cell 6.

[0072] As a preferred embodiment, a plurality of limiting strips 71 are also provided within the mounting frame 7. In this embodiment, an example is provided with two limiting strips 71, wherein the two limiting strips 71 are arranged parallel to each other within the mounting frame 7, and the limiting strips 71 are perpendicularly connected to the side plates of the mounting frame 7, thereby forming a limiting space between the two limiting strips 71 and between the two sides of the mounting frame 7 for the installation of the insulating partition 2, the first heat equalizing plate 3, and the second heat equalizing plate 4.

[0073] Through the formed limiting space, the limiting strip 71 can limit the insulating partition 2 and the first temperature equalizing plate 3 in the front-back direction, while the two sides of the mounting frame 7 can limit the second temperature equalizing plate 4 in the left-right direction, so that the insulating partition 2, the first temperature equalizing plate 3 and the second temperature equalizing plate 4 can be more stable after installation.

[0074] The above description is merely a specific embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should also be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A cooling structure suitable for a lying-type battery cell, characterized by, It includes a liquid-cooled base plate, several insulating partitions, several first heat-equalizing plates, several second heat-equalizing plates, and several third heat-equalizing plates; A plurality of insulating partitions and a plurality of first temperature equalization plates are disposed alternately on the liquid-cooled base plate, and an installation gap is formed between the insulating partitions and the first temperature equalization plates, wherein the first temperature equalization plates are in contact with the liquid-cooled base plate. A plurality of second heat spreaders are disposed at intervals within the mounting gap to form a plurality of mounting cavities, and the second heat spreaders are in contact with and connected to the first heat spreader and / or the liquid-cooled base plate; A plurality of the third heat exchange plates are disposed in the mounting cavity, and a space for mounting the power supply core is formed between the third heat exchange plates and the liquid cooling base plate and / or between two third heat exchange plates. The third heat exchange plates are in contact with the first heat exchange plate and / or the second heat exchange plate. The mounting cavity contains a plurality of battery cells stacked together, and the plurality of battery cells are arranged one-to-one in the accommodating space, with the third heat exchange plate sandwiched between two adjacent battery cells. The insulating partition and the first heat spreader are alternately arranged. When the battery cell is installed, the bottom end face of the battery cell located on both sides of the first heat spreader faces the first heat spreader. The end face where the polarity contact of the battery cell is located is the top end face, and the positive and negative polarity contacts of the battery cell are both arranged on the same end face.

2. The cooling structure suitable for a lying-type battery cell according to claim 1, characterized by, An insulating thermally conductive pad is sandwiched between the battery cell located at the bottom layer and the liquid-cooled base plate.

3. The cooling structure suitable for a lying-type battery cell according to claim 1 or 2, characterized by, An insulating and heat-conducting layer is provided between the battery cell and the first and / or the second and / or the third heat-conducting plate.

4. The cooling structure suitable for a lying-type battery cell according to claim 3, characterized by, The insulating and thermally conductive layer between the battery cell and the second and / or the third heat spreader is an insulating and thermally conductive double-sided adhesive.

5. The cooling structure suitable for a lying-type battery cell according to claim 1 or 4, characterized by, The third temperature equalizer plate has several protruding locking blocks on its side, and the insulating partition plate and / or the first temperature equalizer plate are provided with locking slots for the locking blocks to engage.

6. A battery pack, characterized by, A cooling structure suitable for horizontal battery cells, including any one of claims 1-5.

7. The battery pack of claim 6, wherein, The system includes a mounting frame, with the liquid-cooled base plate serving as an end plate structure on the bottom end face of the mounting frame.

8. The battery pack of claim 7, wherein, The liquid-cooled base plate is formed by splicing together several liquid-cooled substrates, and the liquid-cooled substrates are provided with inlets and outlets for supplying coolant.

9. The battery pack of claim 7 or 8, wherein, The mounting frame is also provided with several limiting strips, and the limiting strips and the two sides of the mounting frame form a limiting space for the installation of the insulating partition, the first heat equalizing plate and the second heat equalizing plate.

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