CN108666451A - Power battery module - Google Patents

Abstract

The invention provides a power battery module. The power battery module is provided with at least one battery monomer and at least one electric connecting plate, wherein the electric connecting plate is in floating connection with the pole of the battery monomer and is used for series connection or parallel connection between different battery monomers. The battery connecting plate in the power battery module is in floating connection with the single battery pole, so that the structure of the power battery module is simplified, and the power battery module is convenient to mount and dismount, and is convenient to use secondarily; meanwhile, the service life of the power battery module is prolonged.

Description

Power battery module

technical field

The invention relates to the field of battery packs for electric vehicles, in particular to a power battery module.

Background technique

With regard to the existing battery grouping technology, when the batteries are connected in series and parallel, the batteries are mainly connected by means of welding or screw fastening of various battery poles to the electrical connection pieces. However, when the electric vehicle is under various harsh working conditions, structural failure and electrical connection failure of the battery module usually occur after long-term use, thereby affecting the service life and safety of the power battery. In addition, when the existing battery poles are welded to the electrical connection piece, the power battery cannot be disassembled or the disassembly process is relatively complicated, which makes it difficult for the power battery to be used again.

Therefore, the power battery module in the prior art has the defects of low service life, low safety and inconvenient secondary use.

Contents of the invention

The technical problem to be solved by the present invention is to provide a power battery module in order to overcome the disadvantages of the power battery module in the prior art, which have a relatively low service life and are inconvenient for secondary use.

The present invention solves the above technical problems through the following technical solutions:

A power battery module, which has at least one battery cell and at least one electrical connection plate, is characterized in that the electrical connection plate is floatingly connected to the pole of the battery cell, and is used for connection between different battery cells. series or parallel.

In this technical solution, the electrical connection board is connected to the battery cells in a floating manner, and even if the electric vehicle is in harsh working conditions, it can self-adaptively adjust its own structure as required, so that the electrical connection board can be used for a long time Reliably electrically connected to the pole of the battery cell, which improves the life of the power battery module; in addition, it is also convenient for the installation and disassembly of the power battery module, so that the power battery module can be compared Convenient for secondary use.

Wherein, the floating connection can be understood as that the electrical connection between the electrical connection plate and the battery cell is not realized through a fixed connection method, but through the connection between the electrical connection plate and the pole of the battery cell. The electrical connection can be realized by a distance-adjustable connection method, for example, by stretching and stretching the elastic element.

Preferably, one end of the electrical connection plate close to the pole of the battery cell has a first accommodating cavity, and a conductive elastic member is embedded in the first accommodating cavity.

In this technical solution, the electrical connection plate is electrically connected to the pole of the battery cell through the conductive elastic member, which facilitates the installation and disassembly of the power battery module, so that the power battery module can be more conveniently In addition, the electrical connection between the conductive elastic element and the pole also simplifies the structure of the power battery module.

Preferably, the first accommodating cavity has a bottom surface and an inner wall surface, the conductive elastic member has a pressing portion and a contact portion, and the pressing portion abuts against the first accommodating cavity The bottom surface, the contact portion is exposed on the outer surface of the electrical connection plate, and abuts against the pole surface of the battery cell.

Preferably, a recess is provided between the bottom surface and the inner wall of the first accommodating cavity, and the recess is recessed toward the outer wall of the electrical connection board along the radial direction of the electrical connection board.

In this technical solution, a wedge-like structure is formed in the first accommodating cavity, which can hold the conductive elastic member more reliably. The structure of the first accommodating cavity is relatively simple, that is to say, the conductive elastic member can be more reliably embedded in the first accommodating cavity through a relatively simple structure, and the cost is low. In fact, the first accommodating cavity may be configured as a dovetail groove.

Preferably, the conductive elastic member has an interference fit with the first accommodating cavity, and is squeezed and fixed between the electrical connecting plate and the pole post of the battery cell.

Preferably, the power battery module further includes a mounting bracket, the mounting bracket is pressed on the battery cell, the mounting bracket has an upper surface and a lower surface oppositely arranged, and the lower surface of the mounting bracket A first installation groove is provided on the surface, and the electrical connection board is correspondingly clamped in the first installation groove.

In this technical solution, the plurality of electrical connection plates are electrically connected to the plurality of battery cells through the mounting bracket, which is equivalent to fixing the plurality of structurally independent electrical connection plates to the Installing on the bracket can not only simplify the structure of the power battery module, but also improve the reliability of the power battery module.

Preferably, the upper surface of the mounting bracket is provided with a second mounting groove, the second mounting groove is set corresponding to the first accommodating cavity, and the center line of the second mounting groove is corresponding to the corresponding The center line of the first accommodating cavity coincides, and a pressing element is embedded in the second installation groove, and the pressing element is pressed on the top of the electrical connection board and is connected to the electrical connection board in a floating manner. .

Preferably, the pressing element is made of insulating plastic material;

The material of the pressing element is nylon.

In this technical solution, the presence of the pressing element enables the power battery module to reliably electrically connect the conductive elastic member to the battery cell even under relatively harsh working conditions, reducing or The structural failure or electrical connection failure of the power battery module due to shaking and other reasons is avoided, and the service life and safety of the power battery module are improved.

Preferably, the pressing element has a connecting portion and a pressing portion, the connecting portion is adapted to the second installation groove, and the pressing portion is connected to the connecting portion along the axial direction of the connecting portion The bottom surface of the connecting part, the pressing part has a second accommodating cavity, the second accommodating cavity extends to the bottom surface of the connecting part, and an elastic element is arranged in the second accommodating cavity, so The first end of the elastic element is arranged on the bottom surface of the connecting part, and the tail end is pressed on the top of the electrical connection board.

In this technical solution, the elastic element can elastically adjust the relative height between the bottom surface of the connecting part and the electrical connection plate according to actual needs, so as to realize the height between the electrical connection plate and the pressing element. floating connection, so that the conductive elastic element can be reliably embedded in the first accommodating cavity, and can be reliably electrically connected to the pole of the battery cell.

Preferably, the second accommodating cavity also has a limiting portion, the limiting portion is arranged on the bottom surface of the connecting portion and extends along the axial direction of the connecting portion, the limiting portion The centerline coincides with the centerline of the second installation groove.

Preferably, the limiting part is made of flame-retardant and insulating elastic-plastic material;

The limiting part is made of nylon.

In this technical solution, on the one hand, the limiting part can limit the elastic element, and limit the movement of the elastic element in the axial direction perpendicular to the connecting part; on the other hand, the limiting The position portion is made of elastic-plastic material, so that the limit portion can directly elastically adjust the relative height between the bottom surface of the connection portion and the electrical connection plate, the structure is simple, and finally the conductive elastic member Even under harsh working conditions, it can still be reliably electrically connected to the pole posts of the battery cells.

Preferably, the top of the electrical connection board has a protrusion, and the center line of the protrusion coincides with the center line of the limiting part and the center line of the second installation groove;

Two ends of the elastic element are respectively sleeved on the limiting portion and the protruding portion.

In this technical solution, on the one hand, the cooperation between the limiting portion and the protruding portion can reliably position the elastic element; on the other hand, the elastic element passes through the limiting portion and the The cooperation of the protruding portion elastically adjusts the relative height between the bottom surface of the connecting portion and the electrical connection plate, since the center of the protruding portion is located on the center line of the first accommodating cavity, the The pressing force of the pressing part can be transmitted to the conductive elastic element in a concentrated manner, and finally the conductive elastic element can be electrically connected to the pole post of the battery cell more reliably.

Preferably, a positioning portion is provided on the outer surface of the pressing portion along the circumferential direction of the pressing portion, and the plane where the positioning portion is located is parallel to the cross section of the pressing portion;

There is a positioning groove on the mounting bracket, and the positioning groove is adapted to the positioning portion.

In this technical solution, the cooperation between the positioning part and the positioning groove reliably limits the movement of the pressing element along the axial direction parallel to the connecting part, and the structure is relatively simple. The positioning part can be set as a plurality of sub-positioning parts distributed at intervals, or can be directly set as a ring-shaped positioning part.

Preferably, the pressing part, the connecting part and the limiting part are an integral structure.

Preferably, the pressing part is an integral structure with the connecting part, the limiting part and the positioning part, and the protruding part is an integral structure with the electrical connection plate.

In this technical solution, the pressing part, the connecting part, the limiting part and the positioning part are set as an integral structure, and at the same time, the protruding part and the electrical connection plate are also set as an integral structure , eliminating the need for various connection methods, and the installation and disassembly are relatively simple; the important thing is that the impact on the reliability of the pressing element caused by various connection errors is avoided, so that the final improvement of the compression element is further improved. The reliability of the electrical connection between the conductive elastic element and the pole.

Preferably, the elastic element is a spring.

Preferably, a third accommodating cavity is provided on the mounting bracket, the top of the third accommodating cavity extends to the lower surface of the mounting bracket, and the third accommodating cavity and the first accommodating cavity The cavities are arranged correspondingly, the centerline of the third accommodating cavity coincides with the corresponding centerline of the first accommodating cavity, and the third accommodating cavity communicates with the first installation groove;

An elastic pressing element is arranged in the third accommodating chamber, and the elastic pressing element is pressed on the top of the electrical connection board and is floatingly connected with the electrical connection board.

Preferably, a limiting portion is provided in the third accommodating cavity, the limiting portion extends from the bottom of the third accommodating cavity along the axial direction of the third accommodating cavity, and the limiting portion The centerline of the limiting part coincides with the centerline of the third accommodating cavity;

The top of the electrical connection plate has a protruding part, the centerline of the protruding part coincides with the centerline of the limiting part;

Two ends of the elastic pressing element are respectively sleeved on the limiting portion and the protruding portion.

In this technical solution, on the one hand, the cooperation between the position limiting portion and the protruding portion can reliably position the elastic pressing element; on the other hand, the elastic pressing element passes through the position limiting The cooperation between the portion and the protruding portion elastically adjusts the relative height between the bottom surface of the third accommodating cavity and the electrical connection plate, so that the conductive elastic member can be reliably electrically connected to the battery cell Pole of the body.

Preferably, the limiting portion and the third accommodating cavity are of an integral structure, and the protruding portion and the electrical connection plate are of an integral structure.

In this technical solution, it is equivalent to that the limiting portion and the mounting bracket are of an integral structure, and on the basis of utilizing the structure of the mounting bracket itself, the conductive elastic member is reliably connected to the battery cell. The floating connection has a simpler structure and higher reliability.

Preferably, the elastic pressing element is a spring.

Preferably, the power battery module further includes a signal acquisition board installed on the installation bracket, each of the electrical connection boards has an extension, and the installation bracket is correspondingly provided with a The hole that fits the part, the protruding part passes through the hole and exposes on the upper surface of the mounting bracket, the signal acquisition board is covered on the protruding part, and the protruding part is provided with threads The protruding part is located between the mounting bracket and the signal collection board, and the signal collection board is connected to the mounting bracket through a plurality of fasteners and a plurality of threaded holes.

In this technical solution, the signal acquisition board realizes the electrical connection with the conductive elastic element and the battery cell through the extension part, and the structure is simple and reliable, so that the signal acquisition board can reliably perform signal collection. The cover plate can protect the signal acquisition board. In addition, the signal acquisition board has the functions of collecting the temperature and voltage of the battery module and balancing the batteries.

Preferably, the power battery module further includes a cover plate covering the signal acquisition board.

Preferably, both ends of the signal acquisition board are provided with low-voltage signal acquisition terminals, and both ends of the cover plate are provided with openings through which the low-voltage signal acquisition terminals penetrate.

Preferably, the upper surface of the mounting bracket also has a third mounting groove for the signal acquisition board and the cover plate to be embedded in, and the third mounting groove is recessed toward the direction of the battery cell;

The outer surfaces of the two side walls of the cover plate have flanges, and the cover plate is clamped in the third installation groove through the flanges.

In this technical solution, the signal acquisition board and the cover plate are arranged in the third installation groove, without additionally increasing the height of the power battery module, and the space utilization rate is high.

Preferably, both ends of the installation bracket are provided with high-voltage output parts, and the high-voltage output parts are used for installing high-voltage plug terminals.

Preferably, the conductive elastic member is a conductive spring.

On the basis of conforming to common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain preferred examples of the present invention.

The positive progress effect of the present invention is:

The battery connection plate of the power battery module in the present invention is connected floatingly with the poles of the battery cells, which not only simplifies the structure of the power battery module, but also facilitates installation and disassembly, thereby facilitating the secondary use of the power battery module; at the same time, It also improves the service life of the power battery module.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of a power battery module according to Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of an exploded structure of the power battery module according to Embodiment 1 of the present invention.

FIG. 3 is a schematic diagram of a part of the internal structure of the power battery module according to Embodiment 1 of the present invention.

FIG. 4 is a schematic front view of the electrical connection board in the power battery module according to Embodiment 1 of the present invention.

FIG. 5 is a schematic diagram of the reverse structure of the electrical connection plate in the power battery module according to Embodiment 1 of the present invention.

FIG. 6 is a schematic structural diagram of an electrical connection board and a mounting bracket in the power battery module according to Embodiment 1 of the present invention.

Fig. 7 is a schematic structural diagram of the mounting bracket in the power battery module according to Embodiment 1 of the present invention.

Fig. 8 is a schematic structural diagram of the pressing element in the power battery module according to Embodiment 1 of the present invention.

FIG. 9 is a schematic diagram of the internal structure of the pressing element in the power battery module according to Embodiment 1 of the present invention.

FIG. 10 is a schematic diagram of part of the internal structure of the power battery module according to Embodiment 2 of the present invention.

Explanation of reference signs:

10: Cover

101: Flange

102: Groove

20: Signal acquisition board

30: Mounting bracket

301: The first installation slot

302: Second installation slot

303: positioning slot

304: The third installation slot

305: High voltage output unit

306: the third storage chamber

307: elastic pressing element

308: The second limit part

40: Electrical connection board

401: the first accommodation chamber

402: Bottom

403: Inner wall surface

404: Protrusion

405: Overhang

50: battery cell

60: Conductive elastic parts

70: Bottom plate

80: Compression element

801: connection part

802: Compression part

803: Second storage cavity

804: elastic element

805: The first limit part

806: Positioning Department

Detailed ways

The following two embodiments are given to illustrate the present invention more clearly and completely in conjunction with the accompanying drawings.

Example 1

As shown in FIG. 1 and FIG. 2 , the power battery module has a cover plate 10 , a signal acquisition board 20 , a mounting bracket 30 , a plurality of electrical connection plates 40 , a plurality of battery cells 50 , a conductive elastic member 60 and a bottom plate 70 . Wherein, a plurality of battery cells 50 are clamped one by one in a plurality of limiting slots on the bottom plate 70, the mounting bracket 30 and the bottom plate 70 are arranged oppositely, and the mounting bracket 30 and the bottom plate 70 are connected by a plurality of screws, the mounting bracket 30 It is pressed on a plurality of battery cells 50 ; the cover plate 10 is covered on the signal collecting board 20 ; the electrical connection plate 40 is floatingly connected to the poles of the plurality of battery cells 50 .

The electrical connection plate 40 is connected to the battery cell 50 in a floating manner. Even if the electric vehicle is under harsh operating conditions, it can self-adaptively adjust its own structure as required, so that the electrical connection plate 40 can be reliably electrically connected to the battery cell 50 for a long time. pole, which improves the life of the power battery module; in addition, it is also convenient for the installation and disassembly of the power battery module, so that the power battery module can be used more conveniently for secondary use.

In this embodiment, as shown in FIG. 3 and FIG. 4 , one end of each electrical connection plate 40 close to the pole of the battery cell 50 has a first accommodating cavity 401 , and a conductive The elastic member 60 is an interference fit with the conductive elastic member 60 and the first accommodating cavity 401 . Wherein, the first accommodating cavity 401 has a bottom surface 402 and an inner wall surface 403, and the conductive elastic member 60 has a pressing part (not shown) and a contact part (not shown), and the pressing part is against the first On the bottom surface 402 of the accommodating cavity 401 , the contact portion is exposed on the outer surface of the electrical connection plate 40 and abuts against the pole surface of the battery cell 50 . In addition, in this embodiment, a recess (not shown) is provided between the bottom surface 402 and the inner wall surface 403 of the first accommodating cavity 401 , and the recess extends toward the electrical connection plate 40 along the radial direction of the electrical connection plate 40 . The direction of the outer wall surface is recessed.

In other alternative embodiments, for a plurality of electrical connection boards 40, the first accommodating cavity 401 may be selectively provided on only one of the electrical connection boards 40 or on other numbers of electrical connection boards 40, instead of only Only limited to the setting method in this embodiment.

In this embodiment, a wedge-like structure is formed in the first accommodating cavity 401 , which can reliably clamp the conductive elastic member 60 , and has a relatively simple structure and low cost. Actually, in this embodiment, the first accommodating cavity 401 is configured as a dovetail groove. In other embodiments, the first accommodating cavity 401 can also be configured in other structures according to actual needs, as long as the conductive elastic member 60 can be reliably electrically connected to the pole post of the battery cell 50 . In addition, in this embodiment, the conductive elastic member 60 can be a conductive spring, and in order to realize the floating connection between the electrical connection plate 40 and the pole post of the battery cell 50, the depth of the first accommodating cavity 401 is the height of the conductive spring. 60% to 80%.

In this embodiment, as shown in FIG. 2 , FIG. 6 and FIG. 7 , the mounting bracket 30 has an upper surface and a lower surface oppositely disposed, and a plurality of first mounting grooves 301 are provided on the lower surface of the mounting bracket 30 . Wherein, a plurality of electrical connection boards 40 are snapped in a plurality of first installation grooves 301 one by one; the upper surface of the installation bracket 30 is provided with a plurality of second installation grooves 302, and the plurality of second installation grooves 302 are connected with the plurality of first installation grooves. One accommodating chamber 401 is provided in one-to-one correspondence, and the center line of the second installation groove 302 coincides with the center line of the corresponding first accommodating chamber 401, and each second installation groove 302 is embedded with a pressing element 80, which presses The tightening element 80 is pressed on the top of the electrical connection board 40 and is floatingly connected with the electrical connection board 40 . In addition, the pressing element 80 is made of insulating plastic material. In this embodiment, the pressing element 80 is made of nylon.

In this embodiment, a plurality of electrical connection plates 40 are installed on the poles of the battery cells 50 through the mounting bracket 30, which is equivalent to fixing a plurality of structurally independent electrical connection plates 40 on the mounting bracket 30. The structure of the power battery module can be simplified, and the reliability of the power battery module can also be improved. The presence of the pressing element 80 enables the power battery module to reliably electrically connect the conductive elastic member 60 to the battery cell 50 even when the power battery module is in relatively severe working conditions, reducing or avoiding any damage caused by shaking or the like. The structural failure or electrical connection failure of the power battery module improves the service life and safety of the power battery module.

As shown in Figure 2, Figure 8 and Figure 9, the pressing element 80 has a connecting part 801 and a pressing part 802, the connecting part 801 is adapted to the second installation groove 302, and the pressing part 802 is along the axial direction of the connecting part 801 The direction is connected to the bottom surface of the connecting portion 801 . Wherein, there is a second accommodating cavity 803 in the pressing part 802, and the second accommodating cavity 803 extends to the bottom surface of the connecting part 802, and an elastic element 804 is arranged in the second accommodating cavity 803, and the head end of the elastic element 804 is arranged on The bottom surface and tail end of the connection portion 801 are pressed on the top of the electrical connection board 40 . In this embodiment, the elastic element 804 is a spring.

Among them, the elastic element 804 can elastically adjust the relative height between the bottom surface of the connecting part 801 and the electrical connection plate 40 according to actual needs, so as to realize the floating connection between the electrical connection plate 40 and the pressing element 80, so that the conductive elastic element 60 can be reliably embedded in the first accommodating cavity 401 , and can enable the conductive elastic element 60 to be reliably electrically connected to the pole of the battery cell 50 .

As shown in FIG. 3 , FIG. 5 and FIG. 9 , the second accommodating cavity 803 also has a first limiting portion 805 , the first limiting portion 805 is arranged on the bottom surface of the connecting portion 801 and along the axial direction of the connecting portion 801 direction; the top of the electrical connection plate 40 has a protruding portion 404, the centerline of the protruding portion 404 coincides with the centerline of the first limiting portion 805 and the centerline of the second mounting groove 302; the head end of the elastic element 804 It is sleeved on the first limiting portion 805 , and the tail end is sleeved on the protruding portion 404 , and there is a gap between the end surface of the first limiting portion 805 and the end surface of the protruding portion 404 . In addition, the first limiting part 805 is made of flame-retardant and insulating elastic-plastic material. In this embodiment, the material of the first limiting part 805 is nylon.

In this embodiment, on the one hand, the cooperation between the first limiting portion 805 and the protruding portion 404 can reliably position the elastic element 804; The cooperation of 404 elastically adjusts the relative height between the bottom surface of the connecting part 801 and the electrical connection board 40, since the center of the protruding part 404 is located on the center line of the first accommodating cavity 401, the pressing part 802 can be pressed tightly. The force can be transferred to the conductive elastic element 60 intensively, and finally the conductive elastic element 60 can be electrically connected to the pole post of the battery cell 50 more reliably.

In addition, as shown in Figure 3, Figure 8 and Figure 9, a positioning part 806 is provided on the outer surface of the pressing part 802 along the circumferential direction of the pressing part 802, and the plane where the positioning part 806 is located is the same as that of the pressing part 802. The cross sections are parallel; the mounting bracket 30 has a positioning groove 303 , and the positioning groove 303 is adapted to the positioning portion 806 . The cooperation between the positioning portion 806 and the positioning groove 303 reliably limits the movement of the pressing element 80 along the axial direction parallel to the connecting portion 801 , and the structure is relatively simple.

In this embodiment, the positioning portion 806 is configured as an annular positioning portion surrounding the pressing portion 802 . In other implementation manners, the positioning part 806 may also be set as a plurality of sub-positioning parts distributed at intervals.

In this embodiment, the pressing part 802 and the connecting part 801 , the first limiting part 805 and the positioning part 806 form an integral structure, and the protruding part 404 and the electrical connection plate 40 form an integral structure. In this way, various connection methods are omitted, and the installation and disassembly are relatively simple; importantly, the impact on the reliability of the pressing element 80 caused by various connection errors is avoided, thereby further improving the electrical conductivity. The reliability of the electrical connection between the elastic element 60 and the pole.

In other embodiments, the conductive elastic member 60 can also be configured in other structures, not limited to a conductive spring; similarly, the elastic element 804 can also be configured in other structures, not limited to a spring.

As shown in Fig. 2 and Fig. 4-6, the middle part of the mounting bracket 30 is provided with a third mounting groove 304 concave to the direction of the battery cell 50, and the length direction of the third mounting groove 304 is parallel to the power battery module the length direction. The electrical connection board 40 has a protruding portion 405, and the protruding portions on both sides of the third installation groove 304 on the mounting bracket 30 are correspondingly provided with holes (not shown) that are compatible with the protruding portion 405, and the protruding portion 405 passes through The hole is located on the upper surface of the third installation groove 304 of the installation bracket 30, and the extension 405 is provided with a threaded hole. The signal acquisition board in FIG. 2 is installed in the third installation groove 304 and covers the extension 405, And it is connected to the mounting bracket 30 through a plurality of fasteners and a plurality of said threaded holes.

2 and as shown, the cover plate 10 is installed on the signal acquisition board 20 in the third installation groove 304, and the outer surface of the two side walls of the cover plate 10 has flanges 101, and the corresponding position of the third installation groove 304 There is a groove for snapping and fixing the flange 101 .

In this embodiment, the signal acquisition board 20 realizes the electrical connection with the battery cell 50 by contacting the protruding part 405 of the electrical connection board 40, so as to obtain the temperature, voltage and battery balancing performance of the battery module. The structure is simple and reliable. This enables the signal collection board 20 to reliably collect signals. The cover plate 10 can protect the signal acquisition board 20. In addition, the cover plate 10 is arranged in the third installation groove 304, without additionally increasing the height of the power battery module, and the space utilization rate is high.

In this embodiment, both ends of the signal acquisition board 20 are provided with low-voltage signal acquisition terminals (not shown), which are used for the output of battery module acquisition data and the input of control signals. As shown in FIG. 2 , the cover plate 10 Both ends are provided with grooves 102 suitable for the low-voltage signal collection terminals. As shown in FIG. 1 , FIG. 2 and FIG. 6 , high voltage output portions 305 are provided at both ends of the mounting bracket 30 , and the high voltage output portions 305 are used to connect to high voltage plug terminals.

Example 2

The structure of the power battery module in this embodiment is basically the same as the structure of the power battery module in Embodiment 1, the difference is that the pressing element in Embodiment 1 is removed in this embodiment, and the mounting bracket 30 Make appropriate improvements to the structure.

As shown in FIG. 10 , the mounting bracket 30 is provided with a third accommodating cavity 306 , the top of the third accommodating cavity 306 extends to the lower surface of the mounting bracket 30 , and the third accommodating cavity 306 corresponds to the first accommodating cavity 401 Set, the centerline of the third accommodating cavity 306 coincides with the centerline of the corresponding first accommodating cavity 401, and the third accommodating cavity 306 communicates with the first installation groove for setting the electrical connection board 40; the third An elastic pressing element 307 is disposed in the accommodating cavity 306 , and the elastic pressing element 307 is pressed on the top of the electrical connection board 40 and is connected to the electrical connection board 40 in a floating manner.

In addition, in this embodiment, a second limiting portion 308 is provided in the third accommodating cavity 306 , and the second limiting portion 308 starts from the bottom of the third accommodating cavity 306 along the axial direction of the third accommodating cavity 306 . direction, and the centerline of the second limiting part 308 coincides with the centerline of the third accommodating cavity 306; the top of the electrical connection board 40 has a protruding part 404, and the centerline of the protruding part 404 is in line with the second limiting part The centerlines of 308 coincide; the two ends of the elastic pressing element 307 are sleeved on the second limiting portion 308 and the protruding portion 404 respectively. In this embodiment, the elastic pressing element 307 is a spring.

On the one hand, the cooperation between the second limiting portion 308 and the protruding portion 404 can reliably position the elastic pressing element 307; The relative height between the bottom surface of the third accommodating cavity 306 and the electrical connection plate 40 is elastically adjusted so that the conductive elastic member 60 can be reliably electrically connected to the pole of the battery cell 50 .

In this embodiment, the second limiting portion 308 and the third accommodating cavity 306 form an integral structure, and the protruding portion 404 and the electrical connection plate 40 form an integral structure, which is equivalent to the second limiting portion 308 and the mounting bracket 30 As an integral structure, the floating connection between the conductive elastic member 60 and the battery cell 50 is reliably realized on the basis of the structure of the mounting bracket 30 itself, and the structure is simpler and the reliability is also higher.

Although the specific implementation of the present invention has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (26)

1. a kind of power battery module has at least one battery cell and at least one electric connection board, which is characterized in that described The pole floating connection of electric connection board and the battery cell, for the serial or parallel connection between different battery cells.

2. power battery module as described in claim 1, which is characterized in that the electric connection board is close to the battery cell One end of pole has the first accommodating cavity, and conductive resilient element is embedded in first accommodating cavity.

3. power battery module as claimed in claim 2, which is characterized in that first accommodating cavity has in a bottom surface and one There is a compressed part and a contact site, the compressed part to be resisted against the bottom of first accommodating cavity for wall surface, the conductive resilient element Face, the contact site are exposed to the outer surface of the electric connection board, and are resisted against the pole surface of the battery cell.

4. power battery module as claimed in claim 3, which is characterized in that the bottom surface of first accommodating cavity and internal face it Between be additionally provided with recess portion, and the recess portion is along the radial recessed to the outside wall surface direction of the electric connection board of the electric connection board.

5. power battery module as claimed in claim 2, which is characterized in that the conductive resilient element and first accommodating cavity Interference fit, and be extruded and be fixed between the electric connection board and the pole of the battery cell.

6. power battery module as claimed in claim 2, which is characterized in that the power battery module further includes an installation branch Frame, the mounting bracket pressure are set to the battery cell, and the mounting bracket has the upper surface being oppositely arranged and a following table The lower surface in face, the mounting bracket is equipped with the first mounting groove, and the electric connection board correspondence is arranged in first mounting groove It is interior.

7. power battery module as claimed in claim 6, which is characterized in that the upper surface of the mounting bracket is equipped with second Mounting groove, second mounting groove are correspondingly arranged with first accommodating cavity, and the center line of second mounting groove with it is corresponding The center line of first accommodating cavity overlap, be embedded with a clamping element, the clamping element pressure in second mounting groove Set on the top of the electric connection board, and with the electric connection board floating connection.

8. power battery module as claimed in claim 7, which is characterized in that the clamping element uses dielectric plastic material system At；

The material of the clamping element is nylon.

9. power battery module as claimed in claim 7, which is characterized in that the clamping element has an interconnecting piece and a pressure Tight portion, the interconnecting piece are adapted with second mounting groove, and the compressed part is connected to along the axial direction of the interconnecting piece The bottom surface of the interconnecting piece, the compressed part is interior, and there is one second accommodating cavity, second accommodating cavity to extend to the interconnecting piece Bottom surface, be equipped with an elastic element in second accommodating cavity, the head end of the elastic element be set to the bottom surface of the interconnecting piece, Tail end pressure is set on the top of the electric connection board.

10. power battery module as claimed in claim 9, which is characterized in that also have a limit in second accommodating cavity Portion, the limiting section is set to the bottom surface of the interconnecting piece and extends along the axial direction of the interconnecting piece, in the limiting section Heart line is overlapped with the center line of second mounting groove.

11. power battery module as claimed in claim 10, which is characterized in that the limiting section is using bullet that is fire-retardant, insulating Plastic material is made；

The material of the limiting section is nylon.

12. power battery module as claimed in claim 10, which is characterized in that

The top of the electric connection board has a protrusion, center line, the institute of the center line of the protrusion and the limiting section The center line for stating the second mounting groove overlaps；

The both ends of the elastic element are socketed in respectively on the limiting section and the protrusion.

13. power battery module as claimed in claim 12, which is characterized in that pressed described in the outer surface upper edge of the compressed part The circumferential direction in tight portion is equipped with a positioning region, and the plane where the positioning region is parallel with the cross section of the compressed part；

There is a positioning groove, the locating slot to be adapted with the positioning region in the mounting bracket.

14. power battery module as claimed in claim 10, which is characterized in that the compressed part and the interconnecting piece, described Limiting section is integral structure.

15. power battery module as claimed in claim 13, which is characterized in that the compressed part and the interconnecting piece, described Limiting section, the positioning region are integral structure, and the protrusion is integral structure with the electric connection board.

16. power battery module as claimed in claim 9, which is characterized in that the elastic element is spring.

17. power battery module as claimed in claim 6, which is characterized in that the mounting bracket is housed equipped with third Chamber, the lower surface of the mounting bracket is extended at the top of the third accommodating cavity, and the third accommodating cavity holds with described first It sets chamber to be correspondingly arranged, the center line of the third accommodating cavity is overlapped with the center line of corresponding first accommodating cavity, and described Third accommodating cavity is connected with first mounting groove；

An elastic compression element is equipped in the third accommodating cavity, the elastic compression element pressure is set on the top of the electric connection board Portion, and with the electric connection board floating connection.

18. power battery module as claimed in claim 17, which is characterized in that be equipped with a limit in the third accommodating cavity Portion, the limiting section extends from the bottom of the third accommodating cavity along the axial direction of the third accommodating cavity, and the limit The center line in position portion is overlapped with the center line of the third accommodating cavity；

The top of the electric connection board has a protrusion, the center line weight of the center line of the protrusion and the limiting section It closes；

The both ends of the elastic compression element are socketed in respectively on the limiting section and the protrusion.

19. power battery module as claimed in claim 18, which is characterized in that the limiting section is with the third accommodating cavity One overall structure, the protrusion are integral structure with the electric connection board.

20. power battery module as claimed in claim 17, which is characterized in that the elastic compression element is spring.

21. power battery module as claimed in claim 6, which is characterized in that the power battery module further includes an installation Signal acquiring board in the mounting bracket, each electric connection board have an extension, are corresponded in the mounting bracket Equipped with hole compatible with the extension, the extension passes through the hole and exposes the upper surface in mounting bracket, institute It states signal acquiring board to be covered on the extension, the extension is equipped with threaded hole, and the extending area is in the installation Between holder and the signal acquiring board, the signal acquiring board is connected to institute by multiple fasteners and multiple threaded holes State mounting bracket.

22. power battery module as claimed in claim 21, which is characterized in that the power battery module further includes that lid is located at Cover board on the signal acquiring board.

23. power battery module as claimed in claim 22, which is characterized in that the both ends of the signal acquiring board are equipped with low pressure Signal acquisition terminal, the both ends of the cover board are equipped with acquires the perforative opening of terminal for the low-voltage signal.

24. power battery module as claimed in claim 22, which is characterized in that the mounting bracket upper surface also has for letter The third mounting groove of number collection plate and cover board insertion, the third mounting groove are recessed to battery cell direction；

There is flange, the cover board to be arranged in the third mounting groove by the flange for the outer surface of the two side of the cover board It is interior.

25. power battery module as claimed in claim 6, which is characterized in that it is defeated that the both ends of the mounting bracket are equipped with high pressure Go out portion, the High voltage output portion is for installing high pressure plug terminal.

26. the power battery module as described in claim 2-25 any one, which is characterized in that the conductive resilient element is to lead Electrical spring.