CTP battery pack with flexibly-packaged battery cells

Abstract

The invention discloses a flexibly-packaged battery cell CTP battery pack, and relates to the technical field of batteries, the flexibly-packaged battery cell CTP battery pack comprises a bottom plate, two cross beams, a plurality of longitudinal beams and a plurality of flexibly-packaged battery cell modules, the two cross beams are arranged on the two sides of the bottom plate at intervals in the vertical direction, and the longitudinal beams are arranged on the two sides of the bottom plate; the plurality of longitudinal beams are arranged between the two cross beams at intervals in the horizontal direction and form a plurality of mounting grooves with the two cross beams, one soft package battery cell module is correspondingly arranged in one mounting groove in the horizontal direction, and a positive pole lug and a negative pole lug of each soft package battery cell module are arranged on the same side facing the cross beams at intervals; the battery pack is divided into the plurality of flexibly-packaged battery cell modules which are arranged in rows through the plurality of longitudinal beams, and the two cross beams are used for fixing and applying pre-tightening force, so that a CTP structure of the flexibly-packaged battery cells is realized, module packaging is not needed, the number of parts of the flexibly-packaged battery cell pack is reduced, the volume utilization rate of the flexibly-packaged battery cell pack is increased, and the cost is reduced. And meanwhile, the heat dissipation efficiency of the soft package battery cell is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a soft-pack CTP battery pack. Background Technology

[0002] With the rapid development of new energy vehicles, power batteries, as the main power source for new energy electric vehicles, are increasingly favored by the market for their safety, reliability, and high energy density. Increased competition in the electric vehicle industry and rapid upgrades in battery technology have led to the gradual introduction of solid-state and semi-solid-state batteries into the market. Currently, battery cell packaging types are divided into rigid-shell cells and pouch cells, and solid-state and semi-solid-state batteries. Due to battery expansion and industry maturity characteristics, the industry mainly uses pouch cell packaging, and the assembly size of pouch cells is becoming increasingly larger. However, it cannot be too long, such that the battery width approaches the width of the vehicle body. Therefore, the industry currently mainly uses module packaging for pouch cells, which are then installed in the battery pack in module form.

[0003] However, modular packaging increases the number of parts and cost of the battery pack, occupies the cell space of the battery pack, and reduces the volume utilization rate of the battery pack and the heat dissipation efficiency of the cells. Summary of the Invention

[0004] This invention provides a soft-pack CTP battery pack to solve the technical problems in the related art where existing module packaging increases the number of battery pack parts and cost, occupies battery pack cell space, and reduces battery pack volume utilization and cell heat dissipation efficiency.

[0005] This invention provides a CTP battery pack with pouch cells, comprising: Base plate; Two crossbeams are arranged vertically at intervals on both sides of the base plate; Multiple longitudinal beams are arranged horizontally between two cross beams and form multiple mounting grooves therebetween. Multiple pouch cell modules are provided, with each pouch cell module horizontally disposed in a mounting slot. The positive and negative electrodes of each pouch cell module are spaced apart and located on the same side facing the crossbeam.

[0006] In some embodiments, each of the pouch cell modules includes: Multiple pouch cells are arranged sequentially in the mounting slot along a horizontal direction; Multiple foam strips, with two foam strips corresponding to both sides of each of the soft-pack battery cells; Multiple insulation materials are provided, with one insulation material between each pair of adjacent foam strips, and one insulation material between each crossbeam and the foam strip.

[0007] In some embodiments, the length and width of each of the pouch cells are smaller than the length and width of the foam strip and the thermal insulation material.

[0008] In some embodiments, the positive and negative tabs on the same side of each of the pouch cells are asymmetrically arranged.

[0009] In some embodiments, the positive electrode tabs of different pouch cells are misaligned, and the negative electrode tabs of different pouch cells are also misaligned.

[0010] In some embodiments, the CTP battery pack further includes: Multiple fixing brackets, one fixing bracket is horizontally disposed above all the positive tabs of one of the soft-pack battery cell modules, and another fixing bracket is horizontally disposed above all the negative tabs of the soft-pack battery cell module; A copper busbar corresponding to each of the fixed supports is provided, one of the copper busbars is arranged horizontally above one of the fixed supports and connected to all the positive tabs of the pouch cell module, and the other copper busbar is arranged horizontally above another of the fixed supports and connected to all the negative tabs of the pouch cell module.

[0011] In some embodiments, there are three longitudinal beams, namely a first longitudinal beam, a second longitudinal beam, and a third longitudinal beam; The first longitudinal beam and the second longitudinal beam are horizontally spaced on both sides of the bottom plate and together with the two cross beams form a box; The third longitudinal beam is positioned horizontally between the first longitudinal beam and the second longitudinal beam.

[0012] In some embodiments, each of the pouch cell modules is spaced equidistantly from the first longitudinal beam and the second longitudinal beam, and forms an exhaust channel with a cover located above the crossbeam. The exhaust channel is connected to an explosion-proof valve located on the outside of the crossbeam to discharge high-temperature and high-pressure gas.

[0013] In some embodiments, each of the pouch cell modules has an insulating structural adhesive at the end near the third longitudinal beam, and the top of each of the pouch cell modules also has an insulating structural adhesive.

[0014] In some embodiments, the CTP battery pack further includes: A liquid cooling plate is laid flat on top of the base plate and located below the soft-pack battery cell module. The liquid cooling plate contains a flowable cooling medium.

[0015] The beneficial effects of the technical solution provided by this invention include: This invention provides a CTP (Chip-to-Pack) battery pack with pouch cells, comprising: a base plate, two crossbeams, multiple longitudinal beams, and multiple pouch cell modules. The two crossbeams are vertically spaced on both sides of the base plate, and the multiple longitudinal beams are horizontally spaced between the two crossbeams, forming multiple mounting slots. Each pouch cell module is horizontally positioned within one of the mounting slots. The positive and negative electrode tabs of each pouch cell module are spaced apart on the same side facing the crossbeams. The battery pack is divided into multiple pouch cell modules arranged in rows by the multiple longitudinal beams, and the pouch cells are fixed and preloaded by the two crossbeams, thus realizing the CTP structure. This eliminates the need for module packaging, reduces the number of parts in the pouch cell battery pack, improves the volume utilization rate of the pouch cell battery pack, and simultaneously improves the heat dissipation efficiency of the pouch cells. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a CTP battery pack with soft-pack cells provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a CTP battery pack with soft-pack cells provided in an embodiment of the present invention; Figure 3 A schematic diagram showing the positional structure of the positive and negative tabs of multiple soft-pack battery cells provided in an embodiment of the present invention; Figure 4 A schematic diagram showing the positional structure of the positive and negative tabs of a single pouch cell provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of multiple pouch cells stacked according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the copper busbar provided in an embodiment of the present invention; Figure label: 1. Base plate; 2. Crossbeam; 3. Longitudinal beam; 31. Mounting groove; 32. First longitudinal beam; 33. Second longitudinal beam; 34. Third longitudinal beam; 4. Soft-pack battery module; 41. Soft-pack battery cell; 411. Positive electrode tab; 412. Negative electrode tab; 42. Foam strip; 43. Thermal insulation material; 5. Fixed bracket; 6. Copper busbar; 7. Top cover; 8. Exhaust passage; 9. Explosion-proof valve; 10. Liquid cooling plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a CTP battery pack with soft-pack cells, which solves the problems of existing module packaging increasing the number of battery pack parts and cost, occupying battery pack cell space, and reducing battery pack volume utilization and cell heat dissipation efficiency.

[0020] Figure 1 and Figure 2 This invention provides a CTP battery pack with soft-pack cells, comprising: a base plate 1, two crossbeams 2, multiple longitudinal beams 3, and multiple soft-pack cell modules 4. The two crossbeams 2 are vertically spaced on both sides of the base plate 1, and the multiple longitudinal beams are horizontally spaced between the two crossbeams 2 to form multiple mounting grooves 31. Each soft-pack cell module 4 is horizontally positioned within one of the mounting grooves 31. The positive electrode tab 411 and the negative electrode tab 412 of each soft-pack cell module 4 are spaced apart on the same side facing the crossbeams 2.

[0021] The CTP battery pack of this invention includes: a base plate, two crossbeams, multiple longitudinal beams, and multiple soft-pack cell modules. The two crossbeams are vertically spaced on both sides of the base plate, and the multiple longitudinal beams are horizontally spaced between the two crossbeams, forming multiple mounting slots. Each soft-pack cell module is horizontally positioned within one of the mounting slots. The positive and negative electrode tabs of each soft-pack cell module are spaced apart on the same side facing the crossbeams. The battery pack is divided into multiple separately arranged soft-pack cell modules by the multiple longitudinal beams, and the CTP structure of the soft-pack cells is achieved by fixing and applying pre-tightening force through the two crossbeams. This eliminates the need for module packaging, reduces the number of parts in the soft-pack battery pack, improves the volume utilization rate of the soft-pack battery pack, and simultaneously improves the heat dissipation efficiency of the soft-pack cells.

[0022] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 3 and Figure 5As shown, each of the soft-pack battery modules 4 includes: multiple soft-pack battery cells 41, multiple foam strips 42, and multiple heat insulation materials 43. The multiple soft-pack battery cells 41 are arranged sequentially in the mounting groove 31 along the horizontal direction. Two foam strips 42 are provided on both sides of each soft-pack battery cell 41. A heat insulation material 43 is provided between each two adjacent foam strips 42. A heat insulation material 43 is also provided between each crossbeam 2 and the foam strips 42. Each soft-pack battery module 4 is formed by pasting multiple soft-pack battery cells 41. A first foam strip 42, a heat insulation material 43, and a second foam strip 42 are arranged sequentially between each two adjacent soft-pack battery cells 41. A heat insulation material 43 and a foam strip 42 are arranged sequentially between the crossbeam 2 and each soft-pack battery cell 41.

[0023] Furthermore, each of the pouch cell modules 4 is fixed with a certain preload by the two crossbeams 2, compressing the multiple foam strips 42 between the multiple pouch cells 41 to a certain deformation. The two crossbeams 2 apply a certain preload F to the stacked pouch cell modules 4. The preload F for optimal performance of the pouch cell module 4 and the corresponding maximum expansion amount s1 of each pouch cell 41 are determined by testing. Based on the pressure-strain curve of the foam and the preload F of each foam strip 42, the optimal preload F is determined. Given the strain a% under the given conditions, determine the total compression b% of all foam strips 42. Calculate the pre-tightened foam strip 42 thickness s2 using the formula s2=s1 / (b%-a%). Then, calculate the thickness s of all pre-tightened foam strips 42 using s=s2*(1-a%). A suitable pre-tightening force F for the soft-pack battery cell and the pre-tightened thickness s of all foam strips 42 can ensure that the soft-pack battery cell module 4 can adapt to the expansion that occurs during charging and discharging, thereby improving the electrochemical performance and safety performance of the soft-pack battery cell module 4.

[0024] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 3 and Figure 5 As shown, the length and width of each of the pouch cells 41 are smaller than the length and width of the foam strip 42 and the heat insulation material 43. When the battery pack is charging and discharging, the volume of each pouch cell 41 will change. When the volume of the pouch cell 41 expands and its length or width increases, the pouch cell 41 is always within the plane of the foam strip 42 and the heat insulation material 43. This avoids the end of the heat insulation material 43 from contacting the pouch cell 41 body through the foam strip 42, which would cause pressure concentration on the pouch cell 41 body and lead to risks such as damage, reduced insulation, and reduced lifespan of the pouch cell 41.

[0025] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 3 and Figure 4 As shown, the positive electrode tab 411 and negative electrode tab 412 on the same side of each of the pouch cells 41 are asymmetrically arranged. The positive electrode tab 411 and negative electrode tab 412 of each of the pouch cells 41 are spaced apart on the same side of the pouch cell 41 facing the crossbeam 2. That is, the positive electrode tab 411 and negative electrode tab 412 of each pouch cell 41 are located at both ends of the same side of the pouch cell 41. Moreover, the distance from one end of the positive electrode tab 411 on the same side of each pouch cell 41 is not the same as the distance from the other end of the negative electrode tab 412. The staggered arrangement of the positive electrode tab 411 and negative electrode tab 412 of each pouch cell 41 facilitates clear identification of the positive electrode tab 411 and negative electrode tab 412 of each pouch cell 41 and avoids damage to the parts due to incorrect installation orientation.

[0026] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 3 and Figure 4 As shown, the positive electrode tabs 411 of different pouch cells 41 are all misaligned, and the negative electrode tabs 412 of different pouch cells 41 are also misaligned. When each pouch cell module 4 is assembled, multiple pouch cells 41 are connected in series and parallel to design the voltage, power and capacity required for the battery pack. After being connected in series and parallel, the positive electrode tabs 411 and negative electrode tabs 412 of multiple pouch cells 41 are all misaligned, which makes it easy to quickly identify the positive electrode tabs 411 and negative electrode tabs 412 of different pouch cells 41, avoid incorrect installation orientation, which may lead to component damage, or even cell short circuit and thermal runaway safety accidents.

[0027] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 5 and Figure 6As shown, the CTP battery pack further includes: multiple fixing brackets 5 and copper busbars 6 corresponding to each fixing bracket 5. One fixing bracket 5 is horizontally positioned above all positive electrode tabs 411 of one of the soft-pack cell modules 4, and another fixing bracket 5 is horizontally positioned above all negative electrode tabs 412 of the same soft-pack cell module 4. One copper busbar 6 is horizontally positioned above one fixing bracket 5 and connected to all positive electrode tabs 411 of the soft-pack cell module 4, and another copper busbar 6 is horizontally positioned above another fixing bracket 5 and connected to all negative electrode tabs 412 of the same soft-pack cell module 4. One fixing bracket 5 is horizontally fixed to two crossbeams 2 and located at... Above all the positive tabs 411 of one of the pouch cell modules 4, a copper busbar 6 is fixed horizontally to the fixing bracket 5. All the positive tabs 411 of the pouch cell module 4 are bent and welded to the copper busbar 6. Another fixing bracket 5 is fixed horizontally to the two crossbeams 2 and located above all the negative tabs 412 of one of the pouch cell modules 4. Another copper busbar 6 is fixed horizontally to the fixing bracket 5. All the negative tabs 412 of the pouch cell module 4 are bent and welded to the other copper busbar 6. Finally, a high voltage of the battery pack is established by series connection. An FPC is arranged above the pouch cell module 4 to collect the voltage and temperature of the pouch cell module 4.

[0028] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 As shown, there are three longitudinal beams 3, namely the first longitudinal beam 32, the second longitudinal beam 33, and the third longitudinal beam 34. The first longitudinal beam 32 and the second longitudinal beam 33 are horizontally spaced on both sides of the base plate 1 and form a box with the two crossbeams 2. The third longitudinal beam 34 is horizontally positioned between the first longitudinal beam 32 and the second longitudinal beam 33. The third longitudinal beam 34 divides the base plate 1 into two symmetrical parts. The soft-pack battery cell modules 4 are stacked in two rows between the first longitudinal beam 32 and the third longitudinal beam 34, and between the second longitudinal beam 33 and the third longitudinal beam 34. The first longitudinal beam 32, the second longitudinal beam 33, and the third longitudinal beam 34 serve to fix and limit the movement.

[0029] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 5As shown, each of the soft-pack battery cell modules 4 is equidistant from the first longitudinal beam 32 and the second longitudinal beam 33, forming an exhaust channel 8 with the upper cover 7 located above the crossbeam 2. The exhaust channel 8 is connected to an explosion-proof valve 9 located on the outside of the crossbeam 2 to discharge high-temperature and high-pressure gases. The distance between each soft-pack battery cell module 4 and the first longitudinal beam 32 and the second longitudinal beam 33 is 25-50mm, and the distance between each soft-pack battery cell module 4 and the third longitudinal beam 34 is 3-10mm. The spacing between each soft-pack battery cell module 4 and the first longitudinal beam 32 and the second longitudinal beam 33, together with the upper cover 7, forms the exhaust channel 8. When a certain soft-pack battery cell... 41. In the event of thermal runaway, high-temperature and high-pressure gas is discharged through the exhaust channel 8 and the explosion-proof valve 9. Simultaneously, when the battery pack is subjected to a lateral impact, the distance between each pouch cell module 4 and the first longitudinal beam 32 and the second longitudinal beam 33 can absorb the impact deformation to ensure that the pouch cell module 4 is not squeezed, and can also reduce the amount of deformation of the pouch cell module 4 under compression, thereby improving the safety of the battery pack. In addition, two or more explosion-proof valves 9 can be respectively provided on the two crossbeams 2. The number of explosion-proof valves 9 depends on the electrochemical properties of the pouch cell 41 in the pouch cell module 4, that is, the volume and pressure of the high-temperature and high-pressure gas released by the runaway cell.

[0030] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 1 and Figure 5 As shown, each of the soft-pack battery cell modules 4 has an insulating structural adhesive at its end near the third longitudinal beam 34 to ensure the insulation performance between the soft-pack battery cell module 4 and the third longitudinal beam 34, and to strengthen the end strength of the soft-pack battery cell module 4 near the third longitudinal beam 34; each of the soft-pack battery cell modules 4 also has an insulating structural adhesive at its top to ensure the insulation performance between the soft-pack battery cell module 4 and the upper cover 7, and to strengthen the top strength of the soft-pack battery cell module 4. The insulating structural adhesive has a heat insulation and insulation function, so that other soft-pack battery cells 41 will not be affected by the small amount of high-temperature and high-pressure gas below the upper cover 7, and will not cause thermal runaway, thus avoiding thermal diffusion.

[0031] Furthermore, each of the pouch cell modules 4 is coated with sealant at the end near the first longitudinal beam 32 and the second longitudinal beam 33, which has a heat insulation and insulating effect, so that the high temperature and high pressure gas in the exhaust channel 8 will not affect other pouch cells 41. At the same time, since heat insulation material is provided between each pouch cell 41, when one pouch cell 41 experiences thermal runaway, it will not affect the adjacent pouch cells 41, thus avoiding heat diffusion. A small amount of high temperature and high pressure gas will be discharged through the gap between the top of the pouch cell 41 and the upper cover 7.

[0032] As an optional implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 5 As shown, the CTP battery pack also includes a liquid cooling plate 10, which is laid flat above the base plate 1 and below the soft-pack cell module 4. The liquid cooling plate 10 contains a flowable cooling medium. Through the flow of the cooling medium, the soft-pack cell module 4 located above the liquid cooling plate 10 is cooled to ensure that the soft-pack cell module 4 operates within a safe and reasonable temperature range. A thermally conductive structural adhesive is also provided between the soft-pack cell module 4 and the liquid cooling plate 10 to conduct the heat generated by the soft-pack cell module 4 during operation to the liquid cooling plate 10, thereby realizing the function of thermal management and simultaneously bonding and fixing the soft-pack cell module 4 to the liquid cooling plate 10.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0034] It should be noted that in this invention, relational terms such as "first" and "second" are used merely 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.

[0035] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A CTP battery pack with soft-pack cells, characterized in that, include: Base plate (1); Two crossbeams (2) are arranged vertically on both sides of the base plate (1); Multiple longitudinal beams (3) are arranged horizontally between two transverse beams (2) and form multiple mounting grooves (31). Multiple pouch cell modules (4), one of the pouch cell modules (4) is disposed in a mounting slot (31) in a horizontal direction, and the positive electrode tab (411) and negative electrode tab (412) of each pouch cell module (4) are spaced apart on the same side facing the crossbeam (2).

2. The CTP battery pack with soft-pack cells according to claim 1, characterized in that, Each of the aforementioned pouch cell modules (4) includes: Multiple pouch cells (41) are arranged sequentially in the mounting groove (31) along the horizontal direction; Multiple foam strips (42), with two foam strips (42) corresponding to each side of each soft-pack battery cell (41); Multiple heat insulation materials (43) are provided, with one heat insulation material (43) between each two adjacent foam strips (42) and one heat insulation material (43) between each crossbeam (2) and the foam strip (42).

3. The CTP battery pack with soft-pack cells according to claim 2, characterized in that: The length and width of each of the pouch cells (41) are smaller than the length and width of the foam strip (42) and the thermal insulation material (43).

4. The CTP battery pack with soft-pack cells according to claim 2, characterized in that: The positive electrode tab (411) and negative electrode tab (412) on the same side of each of the aforementioned pouch cells (41) are asymmetrically arranged.

5. The CTP battery pack with soft-pack cells according to claim 4, characterized in that: The positive electrode tabs (411) of different pouch cells (41) are all misaligned, and the negative electrode tabs (412) of different pouch cells (41) are also misaligned.

6. The CTP battery pack with soft-pack cells according to claim 5, characterized in that, Also includes: Multiple fixing brackets (5), one fixing bracket (5) is arranged horizontally above all the positive electrode tabs (411) of one of the soft-pack battery cell modules (4), and another fixing bracket (5) is arranged horizontally above all the negative electrode tabs (412) of the soft-pack battery cell module (4); A copper busbar (6) corresponding to each of the fixed brackets (5) is arranged horizontally above one of the fixed brackets (5) and connected to all the positive tabs (411) of the soft-pack battery module (4), and another copper busbar (6) is arranged horizontally above another fixed bracket (5) and connected to all the negative tabs (412) of the soft-pack battery module (4).

7. The CTP battery pack with soft-pack cells according to claim 1, characterized in that: There are three longitudinal beams (3), namely the first longitudinal beam (32), the second longitudinal beam (33), and the third longitudinal beam (34); The first longitudinal beam (32) and the second longitudinal beam (33) are spaced horizontally on both sides of the bottom plate (1) and together with the two cross beams (2) form a box; The third longitudinal beam (34) is located horizontally between the first longitudinal beam (32) and the second longitudinal beam (33).

8. The CTP battery pack with soft-pack cells according to claim 7, characterized in that: Each of the soft-pack battery cell modules (4) is arranged at equal intervals with the first longitudinal beam (32) and the second longitudinal beam (33) and forms an exhaust channel (8) with the upper cover (7) located above the crossbeam (2). The exhaust channel (8) is connected to an explosion-proof valve (9) located on the outside of the crossbeam (2) for discharging high-temperature and high-pressure gas.

9. The CTP battery pack with soft-pack cells according to claim 8, characterized in that: Each of the pouch cell modules (4) has an insulating structural adhesive at the end near the third longitudinal beam (34), and each of the pouch cell modules (4) also has an insulating structural adhesive at the top.

10. The CTP battery pack with soft-pack cells according to claim 1, characterized in that, Also includes: Liquid cooling plate (10) is laid flat above the base plate (1) and located below the soft-pack battery module (4). The liquid cooling plate (10) contains a flowable cooling medium.

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