CN219658815U - Battery pack and battery cluster - Google Patents

Abstract

The utility model belongs to the field of batteries, in particular to a battery pack and a battery cluster, which solve the problems of low energy density, high production cost, complex installation and the like of the traditional battery pack caused by the fact that secondary heat exchange tubes are arranged at two ends of a battery pack main body. The heat exchange device comprises a battery pack main body, a heat exchange seat, a primary heat exchange tube and a secondary heat exchange tube, wherein the heat exchange seat is fixed at the top of the battery pack main body; the first-stage heat exchange pipe comprises a first heat exchange piece and a second heat exchange piece which are connected with each other, the first heat exchange piece is fixed on the battery pack main body, and the second heat exchange piece is fixed on the heat exchange seat; the second-stage heat exchange tube is fixed on the heat exchange seat and exchanges heat with the second heat exchange piece. The utility model greatly reduces the size of the battery pack along the length direction thereof, has higher space utilization rate, and further ensures that the energy density of the battery pack is higher.

Description

Battery pack and battery cluster

Technical Field

The utility model belongs to the field of batteries, and particularly relates to a battery pack and a battery cluster.

Background

At present, cylindrical batteries, square batteries and soft package batteries are connected in parallel or in series in the market to form a battery pack.

The prior battery pack has a structure shown in fig. 1, and comprises a battery pack main body formed by connecting a plurality of square batteries 01 in parallel, a primary heat exchange tube 02, a secondary heat exchange tube (not shown in the figure) and an insulating heat exchange member 03; the first part of the primary heat exchange tube 02 is connected with all positive pole columns or all negative pole columns on the battery pack main body, and the second part of the primary heat exchange tube 02 is in insulation heat exchange with the secondary heat exchange tube through an insulation heat exchange piece 06. The heat generated by the operation of the battery pack main body can be exchanged with the secondary heat exchange tube through the primary heat exchange tube 02, so that the service life of the battery is further prolonged. Meanwhile, when the temperature of the battery pack is too low, heat can be transferred to the primary heat exchange tube 02 through the secondary heat exchange tube, and the primary heat exchange tube 02 transfers heat to the pole, so that the battery pack can operate at the optimal temperature.

However, the secondary heat exchange tube and the insulating heat exchange member 03 are arranged at two ends of the battery pack main body, and the arrangement mode increases the size of the battery pack along the length direction of the battery pack, so that the whole volume of the battery pack is larger, the space utilization rate is reduced, and the energy density of the battery pack is reduced.

Disclosure of Invention

The utility model aims to provide a battery pack and a battery cluster, which solve the problem of low energy density of the traditional battery pack caused by the fact that a secondary heat exchange tube and an insulating heat exchange piece are arranged at two ends of a battery pack main body.

The technical scheme of the utility model is as follows:

the battery pack comprises a battery pack main body, a primary heat exchange tube and a secondary heat exchange tube, and is characterized in that: the heat exchange seat is also included; the heat exchange seat is fixed at the top of the battery pack main body; the primary heat exchange pipe comprises a first heat exchange piece and a second heat exchange piece which are connected with each other, the first heat exchange piece is fixed on the battery pack main body, and the second heat exchange piece is fixed on the heat exchange seat; the secondary heat exchange tube is fixed on the heat exchange seat and exchanges heat with the second heat exchange piece.

Further, in order to facilitate installation, the heat exchange seat comprises a heat exchange seat body, wherein a first installation part and a second installation part are respectively arranged at the bottom and the top of the heat exchange seat body; the first installation part is used for fixing the second heat exchange piece, and the second installation part is used for fixing the second heat exchange pipe.

Further, in order to improve the heat exchange effect, reduce the processing cost and enhance the installation stability of the primary heat exchange tube and the secondary heat exchange tube, the primary heat exchange tube is a heat tube, and the secondary heat exchange tube is a temperature control tube;

the first installation part is a first through groove formed in the bottom of the heat exchange seat body, one section of the heat pipe is used as a first heat exchange piece to be fixed on the battery pack main body, and the other section of the heat pipe is used as a second heat exchange piece to be embedded into the first through groove;

the second installation part is a second through groove formed in the top of the heat exchange seat body, and the temperature control Guan Qianru is arranged in the second through groove.

In order to further improve the heat exchange effect, the heat pipe section serving as the first heat exchange piece is fixedly connected with a pole column with the same polarity, wherein at least part of single batteries in the battery pack main body are positioned at the same side; the heat pipe is insulated from the first through groove or the temperature control pipe.

In order to further improve the heat exchange effect and shorten the length of a single heat pipe, the length direction of the battery pack main body is defined as the x direction, and the width direction of the battery pack main body is defined as the y direction;

the number of the first through grooves is four; the four first through grooves are distributed along the x direction, and each first through groove extends along the y direction;

the primary heat exchange tubes are four heat tubes capable of conducting electricity; one section of the two heat pipes is used as two first heat exchange pieces and is fixedly connected with the positive pole of the battery pack main body respectively, and the other section of the two heat pipes is used as two first heat exchange pieces and is fixedly connected with the negative pole of the battery pack main body respectively; the other section of the four heat pipes is used as four second heat exchange pieces, is distributed along the x direction, extends along the y direction, corresponds to the four first through grooves one by one and is embedded into the four first through grooves.

Further, the number of the second through grooves is five, the five second through grooves are distributed along the x direction, and each first through groove extends along the y direction; the temperature control pipes are arranged in the five second through grooves in an S shape or a return shape, one end of each temperature control pipe is used as a heat exchange medium inlet, and the other end of each temperature control pipe is used as a heat exchange medium outlet.

Further, the cross sections of the heat pipe and the temperature control pipe are circular, and the cross sections of the first through groove and the second through groove are semicircular.

In order to further strengthen the installation stability of the heat pipe and the temperature control pipe, the heat exchange seat also comprises a temperature control pipe pressing plate and/or a heat pipe supporting plate; the temperature control pipe pressing plate is fixed at the top of the heat exchange seat body, and the heat pipe supporting plate is fixed at the bottom of the heat exchange seat body;

a plurality of third through grooves which extend along the y direction and are distributed along the x direction and are in one-to-one correspondence with the second through grooves are formed in the bottom surface of the temperature control pipe pressing plate, and the third through grooves and the second through grooves are spliced to form a secondary heat exchange pipe accommodating cavity;

the top surface of the heat pipe supporting plate is provided with a plurality of fourth grooves which extend along the y direction and are distributed along the x direction and are in one-to-one correspondence with the first through grooves, and the fourth grooves and the first through grooves are spliced to form a second heat exchange piece accommodating cavity.

Further, the materials of the temperature control pipe pressing plate and the heat pipe supporting plate are all insulating materials; and the surface of the first through groove and/or the second through groove is provided with heat-conducting glue.

In order to further improve the safety performance of the battery pack and avoid the occurrence of short circuit caused by condensed water, the heat exchange seat further comprises a condensed water collecting disc, the condensed water collecting disc comprises a disc body and a water outlet pipe arranged on the side wall of the disc body, the disc body is positioned between the heat pipe supporting plate and the top of the battery pack main body, and the water outlet pipe extends out of the side wall of the battery pack main body.

The utility model also provides a battery cluster, which is characterized in that: the heat exchange device comprises a plurality of battery pack main bodies, a plurality of heat exchange seats, a plurality of primary heat exchange pipes and a secondary heat exchange pipe which are connected in series;

the heat exchange seats are fixed at the top of each battery pack main body in a one-to-one correspondence manner;

the primary heat exchange pipe comprises a first heat exchange piece and a second heat exchange piece which are connected with each other;

the first heat exchange pieces of each first-stage heat exchange pipe are fixed on the battery pack main body, and the second heat exchange pieces are fixed on the heat exchange seat;

the secondary heat exchange pipes are arranged on all the heat exchange seats in an S shape; and heat exchange is realized with each second heat exchange piece.

The beneficial effects of the utility model are as follows:

1. compared with the battery pack in the background art, the heat exchange seat is arranged at the top of the battery pack main body, so that the size of the battery pack along the length direction is greatly reduced, the space utilization rate is higher, and the energy density of the battery pack is higher.

2. The utility model sets the installation position of the primary heat exchange tube at the bottom of the heat exchange seat, sets the installation position of the secondary heat exchange tube at the top of the heat exchange seat, is convenient for the installation of the primary heat exchange tube and the secondary heat exchange tube, and when in installation, firstly, the primary heat exchange tube is fixed at the top of the battery pack main body, then the heat exchange seat is placed at the top of the battery pack main body, so that the primary heat exchange tube is fixed on the heat exchange seat, further, the heat exchange seat is fixed at the top of the battery pack main body, and finally, the primary heat exchange tube is fixed at the top of the heat exchange seat.

3. The heat pipe and the temperature control pipe are adopted as the primary heat exchange pipe and the secondary heat exchange pipe, and the corresponding installation parts are set to be through grooves, so that compared with other installation modes, the heat pipe and the temperature control pipe have lower processing cost and higher installation stability, and the through grooves distributed along a specific direction are processed on the heat exchange seat without additionally arranging fasteners.

4. In the prior art, the heat pipe of the battery pack needs to extend out of two ends of the battery pack main body to exchange heat with the secondary heat exchange pipe, so that the heat pipe has a longer length, and the manufacturing difficulty of the heat pipe is increased.

5. The temperature of the battery is mainly concentrated on the pole, and the conductive heat pipe is arranged on the battery pole, so that when the temperature of the battery is too high, the heat pipe timely conducts out the heat of the pole, and the heat and the temperature control pipe in the heat exchange seat realize heat exchange, so that the battery can be ensured to run at the optimal temperature.

6. According to the utility model, by additionally arranging four heat pipes, two of the four heat pipes are fixed on the positive pole of the battery pack, and the other two heat pipes are fixed on the negative pole of the battery pack, so that the length of the single heat pipe is shortened, and meanwhile, the heat transmission of all the poles in the battery pack can be realized, and the heat exchange effect is further improved.

7. According to the utility model, the temperature control pipe pressing plate is additionally arranged at the top of the heat exchange seat, and the temperature control pipe is pressed in the second through groove, so that the stability of the temperature control pipe in the second through groove can be further ensured, and meanwhile, the temperature control pipe and the second through groove are tightly contacted, and good heat exchange is realized. The utility model can also add a heat pipe supporting plate at the bottom of the heat exchange seat to be matched with the temperature control pipe pressing plate to press the heat pipe in the first through groove, and can further improve the tightness between the temperature control pipe and the inner wall of the second through groove and further improve the heat exchange effect.

8. According to the utility model, the heat conducting glue is arranged on the surfaces of the first through groove and the second through groove, so that the installation stability of the heat pipe and the temperature control pipe can be further improved, and the heat exchange effect can be improved.

9. When the temperature control pipe is internally provided with a cooling medium and the environmental temperature and humidity are high, a certain amount of condensed water can be generated on the outer wall of the temperature control pipe due to the temperature difference, and if the condensed water is not collected, the condensed water can flow to the battery pack, and under severe conditions, the battery short circuit can be caused, so that serious safety accidents are caused. Therefore, the utility model solves the problem by additionally arranging the condensed water collecting tray at the bottom of the heat exchange seat, and the condensed water on the wall of the temperature control pipe can flow into the condensed water collecting tray, and can be discharged through the water outlet pipe when a certain collecting amount is reached, so that the problem of short circuit caused by flowing into the battery pack is avoided.

Drawings

Fig. 1 is a schematic view of a prior art battery pack;

fig. 2 is a schematic structural view of a battery pack in embodiment 1;

fig. 3 is a schematic structural diagram of a heat exchange seat body in embodiment 1;

FIG. 4 is a schematic view showing the fixing manner of the heat pipe in example 1;

fig. 5 is a schematic structural diagram of the heat exchange seat body and the heat pipe in embodiment 1;

FIG. 6 is a schematic diagram of the heat exchange base in embodiment 1, which is matched with a temperature control tube and a heat pipe;

FIG. 7 is a schematic view showing the structure of a heat exchanging seat in embodiment 1, in which a condensate collecting tray is not provided;

FIG. 8 is a schematic structural diagram of a platen for temperature control tubes in example 1;

fig. 9 is a schematic view of the structure of the heat pipe support plate in embodiment 1;

fig. 10 is a schematic view of the structure of the heat exchange seat in embodiment 1, in which a condensate collecting tray is provided;

fig. 11 is a schematic view of the structure of a condensate water collecting tray of embodiment 1;

fig. 12 is a schematic three-dimensional structure of a battery cluster in example 2;

fig. 13 is a schematic top view of the battery cluster of example 2.

The reference numerals in the drawings are:

01. square battery; 02. a primary heat exchange tube; 03. an insulating heat exchange member;

1. a battery pack main body; 11. a battery pack body top; 2. a heat exchange seat; 20. a heat exchange seat body; 21. a first through groove; 22. a second through slot; 23. a temperature control pipe pressing plate; 231. a secondary heat exchange tube accommodating cavity; 232. a third through slot; 24. a heat pipe support plate; 241. a first heat exchange member accommodating chamber; 242. a fourth slot; 25. a condensed water collecting tray; 251. a tray body; 252. a water outlet pipe; 31. a first heat exchange member; 32. a second heat exchange member; 301. a first heat pipe; 302. a second heat pipe; 303. a third heat pipe; 304. a fourth heat pipe; 4. a secondary heat exchange tube.

Detailed Description

The utility model is further described with reference to the accompanying drawings and specific embodiments; it will be apparent that the described embodiments are some, but not all, embodiments of the utility model.

In addition, the appearances of the phrase "in other embodiments" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Meanwhile, it should be noted that the positional or positional relationship indicated by "top, bottom, inner and outer" and the like in the terms of the specification are based on the positional or positional relationship shown in the drawings, and are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first, second, third or fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 2, the battery pack of the embodiment comprises a battery pack main body 1, a heat exchange seat 2, a primary heat exchange tube 02 and a secondary heat exchange tube 4, wherein the heat exchange seat 2 is fixed at the top 1 of the battery pack main body, and the primary heat exchange tube 02 and the secondary heat exchange tube 4 realize heat exchange in the heat exchange seat 2. Specifically, the heat exchange seat 2 may be a heat exchange plate or a heat exchange sleeve with good heat conduction performance, and the heat exchange plate or the heat exchange sleeve may be devices with different structural forms, so long as heat exchange between the primary heat exchange tube 02 and the secondary heat exchange tube 4 can be realized. For convenience of description, the primary heat exchange pipe 02 may be divided into two parts according to the installation positions, which may be defined as a first heat exchange member 31 and a second heat exchange member 32 (see fig. 5), respectively, and the first heat exchange member 31 and the second heat exchange member 32 may be connected to each other, may be integrally provided, or may be separately provided, wherein the first heat exchange member 31 is fixed to the battery pack body 1, and the second heat exchange member 32 is fixed to the heat exchange seat 2. The secondary heat exchange tube 4 is fixed on the heat exchange seat 2 and exchanges heat with the second heat exchange piece 32.

The second heat exchange member 32 and the secondary heat exchange tube 4 can be fixed with the heat exchange seat 2 by clamping, bonding, nesting and the like. In this embodiment, the heat exchange seat 2 is disposed at the top of the battery pack body 1, and compared with the battery pack shown in fig. 1 (the insulating heat exchange member 06 is fixed to the battery pack at the left and right ends of the battery pack body 1), the size of the battery pack along the length direction (x direction) is greatly reduced, the space utilization rate is improved, and the energy density of the battery pack is further improved.

The heat exchange seat 2 of this embodiment includes a heat exchange seat body 20, as shown in fig. 3, similar to the structure of a heat exchange plate, and a first mounting portion and a second mounting portion for fixing the second heat exchange member 32 and the secondary heat exchange tube 4 are respectively provided at the bottom and the top of the heat exchange plate. That is, the second heat exchange member 32 and the second heat exchange tube 4 are located on two opposite surfaces of the heat exchange seat body 20 in this embodiment, and by this arrangement, the installation of the first heat exchange tube 02, the second heat exchange tube 4, and the heat exchange seat body 20 is facilitated.

During specific installation, the first heat exchange member 31 may be fixed on the battery pack main body 1, then the second heat exchange member 32 is fixed with the bottom of the heat exchange seat body 20, and finally the second heat exchange tube 4 is fixed on the top of the heat exchange seat body 20. In other embodiments, the first and second mounting portions may be provided on both left and right sides of the heat exchange plate. However, this embodiment requires a larger dimension of the heat exchange plate in the height direction of the battery pack, which in turn results in a larger volume of the entire battery pack, reducing energy density, as compared to the present embodiment. The first mounting portion and the second mounting portion may also be disposed at the top or bottom of the heat exchange seat body 20, that is, the first mounting portion and the second mounting portion may be disposed on the same surface of the heat exchange seat body 20, so as to improve the heat exchange effect. However, this embodiment requires a larger dimension of the heat exchange plate along the length direction of the battery pack, still resulting in a larger volume of the entire battery pack and reduced energy density, as compared to the present embodiment. In other embodiments, the heat exchange seat 20 may also adopt a heat exchange sleeve structure, at this time, the second heat exchange member 32 may be inserted into the central cavity of the heat exchange sleeve, the second heat exchange tube 4 may be disposed on the outer wall of the heat exchange sleeve, or the second heat exchange tube 4 may also be inserted into the central cavity of the heat exchange sleeve, the second heat exchange member 32 may be disposed on the outer wall of the heat exchange sleeve, or both the second heat exchange member 32 and the second heat exchange tube 4 may also be disposed on the outer wall of the heat exchange sleeve.

The primary heat exchange tube 02 is a heat pipe, the secondary heat exchange tube 4 is a temperature control tube, the temperature control tube refers to a pipeline in which heat exchange media can be introduced, such as an aluminum pipe, a copper pipe and the like, two ends of the temperature control tube are connected with an external temperature control device, the temperature of the heat exchange media in the temperature control tube is controlled based on the temperature control device, and the temperature control tube and the heat pipe perform heat exchange, so that the battery pack works normally. In other embodiments, gravity thermal rows, aluminum tubes, etc. may also be employed as the primary heat exchange tubes 02.

One section of the heat pipe is used as a first heat exchange piece 31 and is fixed on the battery pack main body 1, and can be directly fixed on the top 1 of the battery pack main body or fixed on a pole as shown in fig. 2, and when the heat pipe is fixed on the pole, the heat pipe is required to be insulated from the temperature control pipe; the other section of the heat pipe is used as a second heat exchange member 32 and is fixed at a first installation part, the first installation part of the embodiment is a first through groove 21 formed at the bottom of the heat exchange seat body 20, the heat pipe is used as one section of the second heat exchange member 32 and is embedded in the first through groove 21, and the second installation part is formed in a second through groove 22 formed at the top of the heat exchange seat body 20 and in a temperature control Guan Qianru second through groove 22. The radius of the first through groove 21 preferably satisfies the following requirements: the second heat exchange piece 32 can be embedded into the first through groove 21, and the second heat exchange piece 32 is tightly contacted with the inner wall of the first through groove 21 after being embedded; the radius of the second through slot 22 preferably meets the following requirements: the temperature control tube can be embedded into the second through groove 22, and the temperature control tube is tightly contacted with the inner wall of the second through groove 22 after the temperature control tube is embedded. In this embodiment, the first installation portion and the second installation portion are designed into through grooves, so that the heat pipe or the temperature control pipe can be better fixed, and meanwhile, the contact area between the heat pipe and the first through groove 21 and the contact area between the temperature control pipe and the second through groove 22 are increased, so that the heat exchange area is increased, and the heat exchange can be effectively realized. In addition, the through groove is formed, and the processing is more convenient and faster than the structure of adding other additional mounting pieces. In other embodiments, the first mounting portion and the second mounting portion may be a clasp and a clamp fixed at the bottom and the top of the heat exchange seat 20, and fix the heat pipe and the temperature control pipe to the heat exchange seat 20 through the clasp and the clamp, but for this embodiment, the mounting manner is more complex, and the contact area of the heat pipe, the temperature control pipe and the heat exchange seat 20 is smaller, so that the heat exchange effect is worse. In other embodiments, the bottom and top of the heat exchange seat 20 may be coated with a heat conducting adhesive, and the heat pipe and the temperature control pipe may be fixed on the heat exchange seat 20 by using an adhesive manner, which has poor stability, but may be combined with the fixing manner of this embodiment, for example, the heat conducting adhesive may be coated in the first through groove 21 and/or the second through groove 22 of this embodiment, so as to further enhance the stability of the heat pipe and the temperature control pipe in the first through groove 21 and the second through groove 22.

Because the temperature of the battery is mainly concentrated on the pole, the heat pipe is adopted as the primary heat exchange pipe 02 in the embodiment, and the heat pipe section as the first heat exchange piece 31 is fixedly connected with the pole of the battery pack main body 1; the heat pipe section as the second heat exchange member 32 is fixed in the first through groove 21 and insulated from the first through groove 21 or the temperature control pipe, and may be implemented by using an insulating heat exchange base 20, for example, the heat exchange base 20 may be a heat conducting ceramic plate, and the heat conducting ceramic plate may be one of an alumina ceramic plate, a silicon nitride ceramic plate, a zirconia ceramic plate, a silicon carbide ceramic plate, a magnesia ceramic plate, a boron nitride ceramic plate, an aluminum nitride ceramic plate, and a beryllium oxide ceramic. In other embodiments, an insulating layer may be added in the first through groove 21 or the second through groove 22. The heat pipe is arranged on the battery pole, when the temperature of the battery is too high, the heat pipe conducts heat between the poles, the heat is transferred to external air or external equipment through the temperature control pipe arranged on the heat exchange seat body 20, and meanwhile, when the temperature of the battery is too low, the temperature control pipe transfers the heat from the heat exchange seat body 20 to the heat pipe, and the heat pipe transfers the heat to the battery pole, so that the battery runs at the optimal temperature.

As shown in fig. 4, four heat pipes with basically equal length and capable of conducting electricity are selected in this embodiment, for convenience of description, the four heat pipes may be respectively defined as a first heat pipe 301, a second heat pipe 302, a third heat pipe 303 and a fourth heat pipe 304, wherein one section of the first heat pipe 301 and one section of the second heat pipe 302 are used as two first heat exchange members 31 and are respectively and fixedly connected with the positive pole of the battery pack main body 1, and one section of the third heat pipe 303 and one section of the fourth heat pipe 304 are used as two first heat exchange members 31 and are respectively and fixedly connected with the negative pole of the battery pack main body 1; the other sections of the first heat pipe 301, the second heat pipe 302, the third heat pipe 303 and the fourth heat pipe 304 are used as four second heat exchanging pieces 32, are distributed along the x direction, extend along the y direction and are positioned at the top of the battery pack main body 1; in order to adapt to the four second heat exchange pieces 32, in this embodiment, four first through grooves 21 are formed in the bottom of the heat exchange seat body 20, the four first through grooves 21 are arranged along the x direction, each first through groove 21 extends along the y direction, the four second heat exchange pieces 32 are in one-to-one correspondence with the four first through grooves 21, and are embedded into the four first through grooves 21, as shown in fig. 5. By arranging four heat pipes and arranging the heat exchange seat base 20 in the middle of the battery pack main body 1, the equal number of poles corresponding to each heat pipe can be ensured, so that the effect of soaking all square batteries in the battery pack main body 1 is achieved. In addition, the length of a single heat pipe can be shortened, and the processing difficulty of the heat pipe is reduced.

As shown in fig. 5, in this embodiment, five second through grooves 22 are formed in the top of the heat exchange seat body 20, the five second through grooves 22 are arranged along the x direction, each first through groove 21 extends along the y direction, and the temperature control tube is fixed in the second through groove 22, as shown in fig. 6, the temperature control tube in this embodiment is a whole tube, is arranged in the five second through grooves 22 in a shape like a Chinese character 'hui', and a section of temperature control tube is fixed in each second through groove, and two ends of the temperature control tube are used as an outlet and an inlet of a heat exchange medium. In other embodiments, an S-shaped arrangement may be selected, or five temperature control tubes may be selected and arranged in the five second through slots 22 in a one-to-one correspondence manner, and two ends of each temperature control tube are an outlet and an inlet of the heat exchange medium.

In other embodiments, the number of the heat pipes, the first through grooves 21 and the second through grooves 22 may be set according to actual needs, for example, two heat pipes may be selected as the primary heat exchange pipe 02, and two corresponding first through grooves 21 and second through grooves 22 may be provided, where one section of one heat pipe is fixed on a part of the positive electrode column, one section of the other heat pipe is fixed on a part of the negative electrode column, and the other section of the two heat pipes is respectively provided in the two first through grooves 21 as the second heat exchange member 32. For another example, a heat pipe may be selected as the primary heat exchange pipe 02, the first through grooves 21 may be one, the second through grooves 22 may be two, in the x direction, the first through grooves 21 may be located between the two second through grooves 22, one section of the heat pipe is used as the first heat exchange member 31 to be fixed on a part of the positive pole or a part of the negative pole, the other section is used as the second heat exchange member 32 to be disposed in the first through grooves 21, at this time, the second heat exchange member 32 may be located between two sections of temperature control pipes, and the second heat exchange member 32 and the two sections of temperature control pipes can perform better heat exchange. For another example, six heat pipes may be selected, and four of the first through grooves 21 are identical to the installation mode in this embodiment, and the other two may be directly fixed on the top of the battery pack main body, so that six formed second heat exchange elements 32 are embedded in the first through grooves 21 in one-to-one correspondence.

In other embodiments, the extending direction of the first through groove 21 may be the same as the first heat exchange member 31, and the extending direction of the second through groove 22 may be the same as or different from the first through groove 21; the number of the first through grooves 21 may be two, and the number of the second through grooves 22 is not limited. That is, the two first through grooves 21 may extend along the x direction, and two heat pipes may be used at this time, where one heat pipe is connected to all the positive poles, and the other heat pipe is connected to all the negative poles, and an intermediate section of the two heat pipes, which is not connected to the poles, may be directly embedded into the two first through grooves 21 as the second heat exchanging member 32, so as to exchange heat with the temperature control pipe embedded into the second through groove 22. But at this time, if the size of the pack body in the x-direction is long, the length of the heat pipe is required to be also long, making it difficult to process the heat pipe. Four heat pipes may be used, two of the heat pipe sections serving as the first heat exchange member 31 are connected with all the positive poles, the other two heat pipe sections serving as the first heat exchange member 31 are connected with all the negative poles, and the four heat pipe sections serving as the second heat exchange member 32 are directly embedded into the two first through grooves 21 without bending, and the embedding length is limited, so that the heat exchange area is smaller than that of the embodiment.

In this embodiment, the heat pipe and the temperature control pipe are round pipes, so the cross sections of the first through groove 21 and the second through groove 22 are preferably semicircular, and the heat pipe and the temperature control pipe are extruded and deformed in the first through groove 21 and the second through groove 22, so that the heat pipe and the temperature control pipe are in close contact with the groove walls, and good heat exchange is achieved. In other embodiments, the shapes of the first through groove 21 and the second through groove 22 may be various, as long as the second heat exchange member 32 and the first through groove 21, the temperature control tube, and the second through groove 22 can be ensured to be in close contact.

As shown in fig. 7, the heat exchange seat 2 of the present embodiment further includes a temperature control tube pressing plate 23 and a heat tube supporting plate 24; in other embodiments, only the temperature control tube platen 23 or the heat tube support plate 24 may be included. The temperature control pipe pressing plate 23 is fixed at the top of the heat exchange seat body 20, and the heat pipe supporting plate 24 is fixed at the bottom of the heat exchange seat body 20; as shown in fig. 8, the bottom surface of the temperature control tube pressing plate 23 is provided with a plurality of third through grooves 232 which extend along the y direction and are distributed along the x direction and are in one-to-one correspondence with the second through grooves 22, and the third through grooves 232 and the second through grooves 22 are spliced to form a temperature control tube accommodating cavity; as shown in fig. 9, the top surface of the heat pipe support plate 24 is provided with a plurality of fourth grooves 242 extending along the y direction and arranged along the x direction and corresponding to the first through grooves 21 one by one, and the fourth grooves 242 and the first through grooves 21 are spliced to form a second heat exchange member 32 accommodating cavity. Based on the temperature control pipe pressing plate 23 and the heat pipe supporting plate 24, the heat pipe can be in closer contact with the first through groove 21, the temperature control pipe and the second through groove 22, and the heat exchange effect is improved.

The edges of the temperature control pipe pressing plate 23 and the heat pipe supporting plate 24 can be fastened by bolts, so that the installation stability of the heat pipe and the temperature control pipe is further enhanced. The materials of the temperature control pipe pressing plate 23 and the heat pipe supporting plate 24 are all insulating materials, for example, ABS can be adopted, and the insulating performance of the whole structure is further ensured.

In order to further improve the safety performance of the battery pack and avoid the occurrence of short circuit caused by condensed water, as shown in fig. 10 and 11, the heat exchange seat 2 of the present embodiment further includes a condensed water collecting tray 25, the condensed water collecting tray 25 includes a tray body 251 and a water outlet pipe 252 disposed on the side wall of the tray body 251, the tray body 251 is located between the heat pipe support plate 24 and the top 1 of the battery pack main body, the water outlet pipe 252 extends along the y direction, and two ends of the water outlet pipe 252 extend out of the side wall of the battery pack main body 1. The side wall of the tray 251 is also provided with a heat pipe abdication groove, so that the heat pipe can be smoothly embedded into the first through groove 21 as a section of the second heat exchange piece. When the temperature control pipe wall is cold in temperature difference to generate condensed water, the condensed water flows into the condensed water collecting tray 25, and when a certain collecting amount is reached, the condensed water is discharged through the water outlet pipe, so that the problem of short circuit caused by flowing into the battery pack is avoided.

Example 2

As shown in fig. 12 and 13, this embodiment is a battery cluster, including a plurality of battery pack bodies in series connection in embodiment 1, and further including a plurality of primary heat exchange tubes 02 and heat exchange seats 2, the structural form of the primary heat exchange tubes 02 and the heat exchange seats 2 and the installation and matching manner with the battery pack bodies are the same as those of embodiment 1, and the following three schemes may be adopted to arrange the secondary heat exchange tubes 4 in this embodiment:

the scheme I adopts a single secondary heat exchange tube 4 which is distributed on the heat exchange seats of all the battery packs according to a shape of a Chinese character 'Hui' or 'S' (see figure 12 or 13); the scheme is simple in arrangement mode, the temperature control pipe is an integral pipe, no leakage point exists, and the problem of short circuit caused by the fact that heat exchange medium flows into the battery pack is avoided.

The second scheme adopts a plurality of secondary heat exchange tubes 4, which can be understood as that the secondary heat exchange tubes 4 of each battery pack in embodiment 1 are connected end to form a whole secondary heat exchange tube, and two ends of the secondary heat exchange tube are used as an inlet and an outlet of a heat exchange medium. Compared with the first scheme, the arrangement method is complex, and leakage points are easy to form at the connecting positions of the secondary heat exchange tubes of each battery pack, so that heat exchange medium flows into the battery pack to cause short circuit.

In the third scheme, a plurality of secondary heat exchange tubes are adopted, the plurality of secondary heat exchange tubes extend along the y direction and are distributed along the x direction, each secondary heat exchange tube is distributed in a plurality of second grooves, the central axes of the battery packs of the embodiment 1 are positioned in the same straight line, and two ends of each secondary heat exchange tube can be used as an inlet and an outlet of a heat exchange medium. The scheme has more connection interfaces with the temperature control device, and finally the whole battery pack has huge volume.

The heat dissipation mode of the primary heat exchange tube and the secondary heat exchange tube has low energy consumption, high efficiency and high cost performance, is suitable for temperature control between large series-connected battery packs, and has important significance for safe and stable operation of batteries.

Claims (11)

1. The utility model provides a group battery, includes group battery main part (1), one-level heat exchange tube (02) and second grade heat exchange tube (4), its characterized in that: the battery pack also comprises a heat exchange seat (2), wherein the heat exchange seat (2) is fixed at the top (11) of the battery pack main body; the primary heat exchange tube (02) comprises a first heat exchange piece (31) and a second heat exchange piece (32) which are connected with each other, wherein the first heat exchange piece (31) is fixed on the battery pack main body (1), and the second heat exchange piece (32) is fixed on the heat exchange seat (2); the secondary heat exchange tube (4) is fixed on the heat exchange seat (2) and exchanges heat with the second heat exchange piece (32).

2. The battery pack according to claim 1, wherein: the heat exchange seat (2) comprises a heat exchange seat body (20), and a first installation part and a second installation part are respectively arranged at the bottom and the top of the heat exchange seat body (20); the first installation part is used for fixing the second heat exchange piece (32), and the second installation part is used for fixing the second-stage heat exchange pipe (4).

3. The battery pack according to claim 2, wherein: the primary heat exchange tube (02) is a heat tube, and the secondary heat exchange tube (4) is a temperature control tube;

the first installation part is a first through groove (21) formed in the bottom of the heat exchange seat body (20), one section of the heat pipe is used as a first heat exchange piece to be fixed on the battery pack main body (1), and the other section of the heat pipe is used as a second heat exchange piece to be embedded into the first through groove (21);

the second installation part is a second through groove (22) formed in the top of the heat exchange seat body (20), and the temperature control Guan Qianru is arranged in the second through groove (22).

4. A battery according to claim 3, wherein: the hot pipe section used as the first heat exchange piece (31) is fixedly connected with a pole column with the same polarity and at least part of single batteries in the battery pack main body (1) are positioned at the same side; the heat pipe is insulated from the first through groove (21) or the temperature control pipe.

5. The battery pack according to claim 4, wherein: defining the length direction of the battery pack main body (1) as an x direction and the width direction of the battery pack main body (1) as a y direction;

the number of the first through grooves (21) is four, the four first through grooves (21) are distributed along the x direction, and each first through groove (21) extends along the y direction;

the primary heat exchange tube (02) is four heat tubes capable of conducting electricity; one section of the two heat pipes is used as two first heat exchange pieces (31) and is fixedly connected with the positive pole of the battery pack main body (1), and the other section of the two heat pipes is used as two first heat exchange pieces (31) and is fixedly connected with the negative pole of the battery pack main body (1); the other section of the four heat pipes is used as four second heat exchange pieces (32), is distributed along the x direction, extends along the y direction, corresponds to the four first through grooves (21) one by one and is embedded into the four first through grooves (21).

6. The battery pack according to claim 4 or 5, wherein: the number of the second through grooves is five, the five second through grooves (22) are distributed along the x direction, and each first through groove (21) extends along the y direction; the temperature control pipes are arranged in the five second through grooves (22) in an S shape or a back shape, one end of each temperature control pipe is used as a heat exchange medium inlet, and the other end of each temperature control pipe is used as a heat exchange medium outlet.

7. The battery pack according to claim 6, wherein: the sections of the heat pipe and the temperature control pipe are round, and the sections of the first through groove (21) and the second through groove (22) are semicircular.

8. A battery pack according to any one of claims 3 to 5, wherein: the heat exchange seat (2) further comprises a temperature control pipe pressing plate (23) and/or a heat pipe supporting plate (24); the temperature control pipe pressing plate (23) is fixed at the top of the heat exchange seat body (20), and the heat pipe supporting plate (24) is fixed at the bottom of the heat exchange seat body (20);

a plurality of third through grooves (232) which extend along the y direction and are distributed along the x direction and are in one-to-one correspondence with the second through grooves (22) are formed in the bottom surface of the temperature control pipe pressing plate (23), and the third through grooves (232) and the second through grooves (22) are spliced to form a secondary heat exchange pipe (4) accommodating cavity;

a plurality of fourth through grooves (242) which extend along the y direction and are distributed along the x direction and are in one-to-one correspondence with the first through grooves (21) are formed in the top surface of the heat pipe supporting plate (24), and the fourth through grooves (242) and the first through grooves (21) are spliced to form a second heat exchange piece (32) accommodating cavity.

9. The battery pack of claim 8, wherein: the materials of the temperature control pipe pressing plate (23) and the heat pipe supporting plate (24) are insulating materials; the surface of the first through groove (21) and/or the surface of the second through groove (22) are/is provided with heat-conducting glue.

10. The battery pack according to claim 9, wherein: the heat exchange seat (2) further comprises a condensed water collecting disc (25), the condensed water collecting disc (25) comprises a disc body (251) and a water outlet pipe (252) arranged on the side wall of the disc body (251), the disc body (251) is located between the heat pipe supporting plate (24) and the top (11) of the battery pack main body, and the water outlet pipe (252) extends out of the side wall of the battery pack main body (1).

11. A battery cluster, characterized by: the method is characterized in that: the heat exchange device comprises a plurality of battery pack main bodies (1), a plurality of heat exchange seats (2), a plurality of primary heat exchange pipes (02) and a secondary heat exchange pipe (4) which are connected in series;

the heat exchange seats (2) are fixed at the top (11) of each battery pack main body in a one-to-one correspondence manner;

the primary heat exchange tube (02) comprises a first heat exchange piece (31) and a second heat exchange piece (32) which are connected with each other;

the first heat exchange pieces (31) of each first-stage heat exchange pipe (02) are fixed on the battery pack main body (1), and the second heat exchange pieces (32) are fixed on the heat exchange seat (2);

the secondary heat exchange tubes (4) are arranged on all heat exchange seats in an S shape; heat exchange with each second heat exchange member (32) is achieved.